Answers
The applied force must be larger than the frictional force for a body to move successfully.
What is friction?Between two surfaces that are sliding or attempting to slide over one another, there is a force called friction. For instance, friction makes it challenging to push a book down the floor. Friction always moves an object in a direction that is counter to the direction that it is traveling or attempting to move.
When a body is pushed, an exact quantity of frictional force is created, up until the point where Fs max = coefficient of friction * normal force.
After that, when fs max exceeds the frictional force, dynamic friction enters the picture, which is what causes the body to move.
The body begins to move after a force is applied that is more than the minimal need, or what we refer to as the Threshold (f applied > fs max).
In the case of a frictionless surface, the applied force will be perpendicular to the gravitational force that is being taken into account. Even the slightest acceleration must cause the body to move.
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Related Questions
Set three resistances to 2, 3, and 5 Ohms in series, and determine the current in the circuit with an ammeter. Take the snapshot of the screen showing the circuits and the reading of the ammeter. Then, replace these three resistors with just one resistance of 10 Ohm. Determine the current running in the circuit. Take a snapshot showing the circuits and the reading of the ammeter. Is the current the same as in the previous experiment with the three resistors
Answers
Answer:
the current in the circuit must be the same.
Explanation:
The equivalent resistance in a series circuit is the sum of the resistances
in this case
R_{eq} = R₁ + R₂ + R₃
we calculate
R_{eq} = 2 + 3 + 5
R_{eq} = 10 Ω
We can see that the equivalent resistance is equal to the resistance to be changed, so the current in the circuit must be the same.
The only change there may be is due to the tolerances of the resistors
the-------change from time to time
Answers
Im not sure if it is what you mean, but the expression "from time to time" means If you do something from time to time, you do it occasionally but not regularly.
. If two vectors are equal, what can you say about their components?
Answers
Answer:
If two vectors are equal, their components are also equal. For example, vector A and B both share the same x, y, and z components. By having the same components, the magnitude and direction does not change, which attest to how the vectors are identical.
So, if two vectors are equal, their components are also equal.
In vector mathematics, when two vectors are equal, it means their corresponding components are also equal. Thus, the magnitude and direction of the two vectors must be identical.
Explanation:In the world of mathematics, specifically vector mathematics, if two vectors are equal, that means their corresponding components are also equal. A vector is typically described by its individual components which are its magnitude (size) and direction.
For example, if vector A and vector B are equal, and vector A = \((x_1, y_1)\) and vector B = \((x_2, y_2)\), then\(x_1 = x_2\) and \(y_1 = y_2\). This applies to vectors in two-dimensional and three-dimensional spaces as well. Therefore, equality in vectors involves the same direction and magnitude causing the corresponding components to be equal.
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A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 7.0 m/s2; after 3.8 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant velocity of 73.3 m/s overtakes and passes the entering car. The entering car maintains its acceleration. How much time is required for the entering car to catch up with the other car
Answers
Answer:
t = 13.3 s
Explanation:
The distance traveled by both cars once they are in the main speedway, assuming that the acceleration of the refueling car is constant, is given by the following kinematic equation:\(x = v_{o}*t + \frac{1}{2} * a * t^{2} (1)\)
The refueling car (which we will call car 1) in the moment that enters to the main speedway, has achieved a speed that can be found from the definition of acceleration, rearranging terms, as follows:\(v_{f1} = a* t = 7.0m/s2*3.8s = 26.6 m/s (2)\)
So, since vf1 = v₀ in (1), we get:\(x_{1} = v_{f1}*t + \frac{1}{2} * a * t^{2} (3)\)
Now, for the other car (which we will call car 2), due to is moving at a constant speed, a=0, so we can write the following equation for x₂:\(x_{2} = v_{f2}*t = 73.3m/s*t (4)\)
When the entering car catches up the other car, both distances will be equal each other, so x₁ = x₂, as follows:\(26.6m/s*t + \frac{1}{2} * 7.0m/s2* t^{2} = 73.3m/s*t\) Rearranging, simplifying and solving for t:\(t =\frac{2*(73.3m/s-26.6m/s}{7.0m/s2} = 13.3 s (5)\)FILL IN THE BLANK. A ________ is a well-tested and widely accepted view that best explains certain scientific observations.
Answers
A scientific theory is a well-tested and widely accepted view that best explains certain scientific observations.
A scientific theory is a comprehensive and coherent explanation of a set of phenomena based on empirical evidence. It is not just a guess or speculation, but rather a well-supported and well-tested explanation that has been subjected to rigorous testing and scrutiny by the scientific community. Scientific theories are supported by a large body of evidence, and they can be used to make predictions and guide further research.
Scientific theories are an important part of the scientific method, which is a systematic approach to gaining knowledge and understanding about the natural world. Theories play a critical role in helping scientists make sense of their observations and in developing new ideas and hypotheses.
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What type of mirror can produce both
converging and diverging rays?
Answers
Answer:
A convex mirror is a diverging mirror (f is negative) and forms only one type of image. It is a case 3 image—one that is upright and smaller than the object, just as for diverging lenses.
Explanation:
hope this helps have a good night :)
Concave mirror can produce both converging and diverging rays.
What is concave mirror?A hollow spherical can be made into a mirror by cutting it into pieces, painting the exterior surface, and using the interior surface as the reflecting surface. Concave mirrors are this kind of mirror.
When object is placed inside focal length, convex mirror diverges the light beams and produces virtual image.
When object is placed outside focal length, convex mirror converges the light beams and produces real and diminish image.
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4. A rocket has landed on Planet X, which has half the radius of Earth. An astronaut onboard the rocket weighs twice as much on Planet X as on Earth. If the escape velocity for the rocket taking off from Earth is v0, then its escape velocity on Planet X is
(A) 2v0
(B) sqrt(2)v0
(C) v0
(D) v0/2
(E) v0/4
Answers
The escape velocity for the rocket taking off from Earth is v0, then its escape velocity on Planet X is (A) 2v0.
The surface gravity of a planet is given by:
g = \(GM/R^2,\)
where G is the gravitational constant, M is the mass of the planet, and R is the radius of the planet.
Let's assume that the mass of the astronaut is m. On Earth, the weight of the astronaut is given by:
mg = \(GMearth/Rearth^2,\)
where Mearth and Rearth are the mass and radius of the Earth, respectively.
On Planet X, the weight of the astronaut is given by:
mgx =
Since the astronaut weighs twice as much on Planet X as on Earth, we have:
mgx = 2mg.
Combining these equations, we get:
\(GMx/Rx^2 = 2GMearth/Rearth^2.\)
Since Planet X has half the radius of Earth, we have:
Rx = Rearth/2.
Substituting this into the above equation, we get:
GMx/\((Rearth/4)^2\) = 2GMearth/\(Rearth^2,\)
or
GMx = 8GMearth.
The escape velocity of a planet is given by:
v_escape = sqrt(2GM/R),
where R is the radius of the planet.
On Earth, the escape velocity is:
v_escape,earth = sqrt(2GMearth/Rearth).
On Planet X, the escape velocity is:
v_escape,x = sqrt(2GMx/Rx).
Substituting the expressions for GMx and Rx, we get:
v_escape,x = sqrt(2(8GMearth)/(Rearth/2)),
or
v_escape,x = sqrt(32) * sqrt(GMearth/Rearth).
Since sqrt(32) is approximately equal to 5.66, we have:
v_escape,x = 5.66 * v_escape,earth.
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In a certain lab experiment, a spring gun was placed on a table and fired a steel ball horizontally outward. A student determines that the ball starts 1.0 m above the floor and travels 2.7 m before striking the floor
In a certain lab experiment, a spring gun was placed on a table and fired a steel ball horizontally outward. A student determines that the ball starts 1.0 m above the floor and travels 2.7 m before striking the floor.
(a) Determine the time that the ball is in the air. (2 pts)
(b) Determine the initial velocity of the ball. (2 pts)
Answers
a) The time that the ball is in the air is 0.23 second.
b) The initial horizontal velocity of the ball is 11.74 m/s.
What is velocity?
The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction.
Vertical height of the point = 1.0 meter.
The horizontal distance travelled by the ball = 2.7 m.
a) The time that the ball is in the air is = √(H/2g)
= √(1.0/2×9.8)
= 0.23 second
b) The initial horizontal velocity of the ball is = 2.7 m/0.23 s
= 11.74 m/s
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What computer measures physical quantities?
Answers
Answer:
Three Types of Computer The Computer are classified into three main types:: • Analog Computers • Digital Computers • Hybrid Computers (Analog + Digital) Analog Computers:: Analog Computer measures “Physical Quantities” for example Temperature, Voltage, Pressure, and Electric Current.
The rainbow of visible colors in the electromagnetic spectrum varies continuously from the longest wavelengths (the reddest colors) to the shortest wavelengths (the deepest violet colors) our eyes can detect. Wavelengths near 655 nm are perceived as red. Those near 515 nm are green and those near 475 nm are blue. Calculate the frequency of light (in Hz) with a wavelength of 655 nm, 515 nm, and 475 nm.
HINT
(a)
655 nm
Hz
(b)
515 nm
Hz
(c)
475 nm
Hz
Answers
Answer:
The frequency of light can be calculated using the formula:
`c = λv`
Where `c` is the speed of light in a vacuum, `λ` is the wavelength of light, and `v` is the frequency of light.
The speed of light in a vacuum is `3.00 × 10^8 m/s`.
To convert the wavelength from nanometers to meters, we need to divide by `1 × 10^9`.
Thus, the frequency of light with a wavelength of 655 nm is:
`v = c/λ`
`v = (3.00 × 10^8 m/s)/(655 × 10^-9 m)`
`v = 4.58 × 10^14 Hz`
Therefore, the frequency of light with a wavelength of 655 nm is `4.58 × 10^14 Hz`.
Similarly, the frequency of light with a wavelength of 515 nm is:
`v = c/λ`
`v = (3.00 × 10^8 m/s)/(515 × 10^-9 m)`
`v = 5.83 × 10^14 Hz`
Therefore, the frequency of light with a wavelength of 515 nm is `5.83 × 10^14 Hz`.
Finally, the frequency of light with a wavelength of 475 nm is:
`v = c/λ`
`v = (3.00 × 10^8 m/s)/(475 × 10^-9 m)`
`v = 6.32 × 10^14 Hz`
Therefore, the frequency of light with a wavelength of 475 nm is `6.32 × 10^14 Hz`.
So, the frequency of light with a wavelength of 655 nm is `4.58 × 10^14 Hz`, the frequency of light with a wavelength of 515 nm is `5.83 × 10^14 Hz` and the frequency of light with a wavelength of 475 nm is `6.32 × 10^14 Hz`.
A closed pipe of length 50cm has water at 40cm. After been struck with a frequency of 256Hz, the water level moves up to 45 cm. What is the wavelength? A. 4120 B. 5120 C. 4320 D. 4425
Answers
The wavelength of the closed pipe, given the level the water moves up to, would be B. 5120.
How to find the wavelength ?The pipe, when it resonates with a sound wave, acts as a pipe closed at one end. The length of the air column in the pipe is the part of the pipe that is above the water.
Initially, the length of the air column is:
50cm - 40cm = 10cm
The initial wavelength (λi) is 4 times this length, or 40cm.
After being struck, the length of the air column changes to:
50cm - 45cm = 5cm
The new wavelength (λf) is 4 times this length, or 20cm. When converted, we get 5, 120.
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The wavelength is 5120m.
When the pipe reverberates with a sound wave, it behaves like a pipe that is closed at one end.
The portion of the pipe above the water is the length of the air column in the pipe.
The air column's initial length is:
50 cm - 40 cm = 10 cm.
This length, or 40cm, is the starting wavelength (i).
After being struck, the air column's length becomes:
50 cm - 45 cm = 5 cm
The new wavelength (f) is 20 cm, or four times this length.
In conversion, we obtain 5, 120.
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how do you use the coefficient to calculate the number of atoms in each molecule?
Answers
Answer:
To find out the number of atoms: MULTIPLY all the SUBSCRIPTS in the molecule by the COEFFICIENT. (This will give you the number of atoms of each element.)
Explanation:
Which of the following is NOT a way that a U-235 atom could fission?
Answers
Answer: A.
just did it
Explanation:
How to calculate the friction force when a body travels through the loop (like in a roaller-coaster) at some point between the top and the bottom?????
Answers
Answer:
I think Fgrav=mg
Explanation:
The magnitude of the force acting on the roller coaster car (or passenger) can be calculated using the formula FGRAV=m.g, where the acceleration due to gravity is represented by g (where g=9.8 m/s2).
The magnitude of the normal force depends on three factors—
the speed of the car, the radius of the loop, and the mass of the rider.If a snowboarder’s initial speed is 4 m/s and comes to rest when making it to the upper level. With a slightly greater initial speed of 5 m/s, the snowboarder is moving to the right on the upper level. His final speed in this case is 3 m/s. Suppose this situation is repeated on planet Epsilon, where gravity is less than gravity on earth.
A. Would the height of the hill on Epsilon cause a reduction in speed from 4 m/s to 0 greater than, less than, or equal to the height of the corresponding hill on earth? Explain.
B. Consider the hill on Epsilon discussed in part A. If the initial speed at the bottom of the hill is 5 m/s, will the final speed at the top of the hill be greater than, less than, or equal to 3 m/s? Explain.
Answers
(a) At a corresponding hill on Earth and a lesser gravity on planet Epslion, the height of the hill will cause a reduction in the initial speed of the snowboarder from 4 m/s to a value greater than zero (0).
(b) If the initial speed at the bottom of the hill is 5 m/s, the final speed at the top of the hill be greater than 3 m/s.
Conservation of mechanical energy
The effect of height and gravity on speed on the given planet Epislon is determined by applying the principle of conservation of mechanical energy as shown below;
ΔK.E = ΔP.E
¹/₂m(v²- u²) = mg(hi - hf)
¹/₂(v²- u²) = g(0 - hf)
v² - u² = -2ghf
v² = u² - 2ghf
where;
v is the final velocity at upper levelu is the initial velocityhf is final heightg is acceleration due to gravitywhen u² = 2gh, then v² = 0,
when gravity reduces, u² > 2gh, and v² > 0
Thus, at a corresponding hill on Earth and a lesser gravity on planet Epslion, the height of the hill will cause a reduction in the initial speed of the snowboarder from 4 m/s to a value greater than zero (0).
Final speedv² = u² - 2ghf
where;
u is the initial speed = 5 m/sg is acceleration due to gravity and its less than 9.8 m/s²v is final speedhf is equal heightSince g on Epislon is less than 9.8 m/s² of Earth;
5² - 2ghf > 3 m/s
Thus, if the initial speed at the bottom of the hill is 5 m/s, the final speed at the top of the hill be greater than 3 m/s.
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In an experiment, students used video analysis to track the motion of an object falling vertically through a fluid in a glass cylinder. The object of m = 12 g is released from rest at the top of the column of fluid, as shown above. The data for the speed v of the falling object as a function of time t are graphed on the grid below. The dashed curve represents the best fit chosen by the students for these data.
Answers
Acceleration is 2.22 m/ at t = 0.20 s. We can use the graph to know the value of the acceleration.
The time rate of change of velocity is known as acceleration. An object accelerated when its speed is increasing or decreasing or it is changing direction of motion. The car is moving forward in a positive direction and speeding up is an example of acceleration.
acceleration = change in velocity/ change in time
= a = ΔV/ΔT
So, in our question,
= a = 0.8 - 0.6/0,2-0.3
= a = 2.22 m
There are three types of accelerated motions : 1) uniform acceleration, 2)non-uniform acceleration and 3)average acceleration.
Acceleration is a vector quantity. Its SI unit is m/s²
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The complete question:
In an experiment, students used video analysis to track the motion of an object falling vertically through a fluid in a glass cylinder. The object of m = 12 grams is released from rest at the top of the column of fluid, as shown above. The data for the speed v of the falling object as a function of time t are graphed on the grid below. The dashed curve represents the best fit chosen by the students for these data 1.0 0.8 0.6 v (m/s) 0.4 0.2 0.0 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 Using the graph, calculate an approximate value for the magnitude of the acceleration of the object at t= 0.20 s and at t=0.05s.
write a mini TWO Paragraph "Blog Post" on the effects of the loss of gravity on the human body. Tell how it will help astronauts on a mission to MARS.
PLEASE HELP!! IT'S IMPORTANT!! I'm NOT GOOD AT SCIENCE:( PLEASE I NEED THIS NOW MY TEACHER WANTS IT!!!!!
Answers
The loss of gravity has a significant impact on the human body. When in a state of weightlessness, the body's muscles and bones are not required to work as hard as they do on Earth.
As a result, astronauts in space experience muscle and bone loss, as well as a decrease in overall physical fitness. This is due to the fact that gravity is no longer providing the resistance needed for muscles and bones to maintain their strength.
What is the gravity about?This effect can be beneficial for astronauts on a mission to Mars. The journey to Mars takes several months, and astronauts will be in a state of weightlessness for a large portion of that time.
The muscle and bone loss that occurs in space can be used to the astronaut's advantage. When they land on Mars, the planet's gravity will be only about 38% of Earth's. As a result, the astronauts will be better able to adapt to the planet's lower gravity and carry out their mission.
Hence, It's important to note that these effects are not permanent, and scientists are currently researching ways to mitigate the negative effects of weightlessness and to develop exercise regimens and other countermeasures to help astronauts maintain their physical fitness during long-duration spaceflight.
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Why do hurricanes develop over oceans?
Question 5 options:
The ocean is affected by the Coriolis effect.
The ocean winds blow from north to south.
The warmer ocean adds water vapor to the air mass.
The ocean currents cause air to move toward the land.
Answers
My guess is; The warmer ocean adds water vapor to the air mass.
I'm really sorry if I'm wrong
The warmer ocean adds water vapor to the air mads
ametal of mass 0.6kg is heated by an electric heater connected to 15v batter when the ammeter reading is 3A its tempeeature rises feom 20c to 85c in 10 minutes calculate the s.h.c of metal cylinder
Answers
Answer:
692 J/kg/°C
Explanation:
Electric energy added = amount of heat
Power × time = mass × SHC × increase in temperature
Pt = mCΔT
(15 V × 3 A) (10 min × 60 s/min) = (0.6 kg) C (85°C − 20°C)
C = 692 J/kg/°C
Two parallel, vertical, plane mirrors, 38.8 cm apart, face each other. A light source at point P is 30.1 cm from the mirror on the left and 8.7 cm from the mirror on the right.
(a) How many images of point P are formed by the mirrors?
(b) Find the distance from the mirror on the right to the two nearest images behind the mirror.
first nearest image=
second nearest image=
(c) Find the number of reflections of light rays for each of these images.
first nearest image=
second nearest image=
Answers
Answer:
Explanation shown below.
Explanation:
1.The number of images formed by 2 parallel mirrors is an infinite number of images.
2. The characteristics of a plane mirror is such that the object distance equals the image distance.
Hence the object distance is 8.7cm from the right; the image formed would be 8.7cm behind the mirror.
Now a second image is going to be formed by the left mirror which is going to have an image distance of 30.1cm behind the mirror.
Now this image would be reflected on the right side to form a new image which is going to be seen as 38.8 +30.1 = 68.9cm behind the right Mirror .
Hence the shortest distances are 8.7cm and 68.9cm
3. The number of reflections is infinite for both cases.
A ball is dropped from a state of rest at time t = 0.The distance traveled after t seconds is s(t) = 16t^2 ft.(a) How far does the ball travel during the time interval [4, 4.5] ?____ ft(b) Compute the average velocity over (4, 4.5) .____ft/sec(c) Compute the average velocity over time intervals [4, 4.01] , [4, 4.001] , [4, 4.0001] , [3.9999, 4] , [3.999, 4] , [3.99, 4]Use this to estimate the object's instantaneous velocity at t=4V(4) = ____ft/sec
Answers
Given that the distance traveled by the ball after t seconds is
\(s(t)=16t^2\text{ ft}\)(a) We have to find the distance traveled by the ball during the time interval [4,4.5]
Here, the time t1 = 4 sec
The time t2 = 4.5 sec
The distance traveled during this time interval will be
\(\begin{gathered} s(t2)-s(t1)=16(4.5)^2-16(4)^2 \\ =324-256 \\ =\text{ 68 ft} \end{gathered}\)Thus, the ball traveled 68 ft during the time interval [4,4.5].
(b) We have to calculate the average velocity over the time t1 = 4 sec and
t2 = 4.5 sec.
The average velocity will be
\(\begin{gathered} v_{av}=\frac{16\times(4.5)^2-16\times(4)^2}{4.5-4} \\ =136\text{ ft/sec} \end{gathered}\)Thus the average velocity is 136 ft/sec over time (4,4.5)
(c) We have to find the average velocity over the time intervals
[4.4.01], [4, 4.001],[4,4.0001],[3.9999,4],[3.999,4],[3.99,4]
The average velocity for the time interval [4,4.01] is
\(\begin{gathered} v_{av}1\text{ = }\frac{16\times(4.01)^2^{}-16\times(4)^2}{4.01-4} \\ =128.16\text{ ft/sec} \end{gathered}\)The average velocity for the time interval [4,4.001] is
\(\begin{gathered} v_{av}2\text{ = }\frac{16\times(4.001)^2-16\times(4)^2}{4.001-4} \\ =128.016\text{ ft/sec} \end{gathered}\)The average velocity for the time interval [4,4.0001] is
\(\begin{gathered} v_{av}3\text{ = }\frac{16\times(4.0001)^2-16\times(4)^2}{4.0001-4} \\ =128.0016\text{ ft/sec} \end{gathered}\)The average velocity for the time interval [3.9999,4] is
\(\begin{gathered} v_{av}4\text{ = }\frac{16\times(4)^2-16\times(3.9999)^2}{4-3.9999} \\ =127.9984\text{ ft/sec} \end{gathered}\)The average velocity for the time interval [3.999,4] is
\(\begin{gathered} v_{av}5\text{ = }\frac{16\times(4)^2-16\times(3.999)^2}{4-3.999} \\ =127.984\text{ ft/sec} \end{gathered}\)The average velocity for the time interval [3.99,4] is
\(\begin{gathered} v_{av}6\text{ = }\frac{16\times(4)^2-16\times(3.99)^2}{4-3.99} \\ =127.84\text{ ft/sec} \end{gathered}\)We can estimate the object's instantaneous velocity at t = 4 sec as
V(4) = 128 ft/sec
As all the values are nearing to 128 ft/sec
A violin has a string of length
0.320 m, and transmits waves at
622 m/s. At what frequency does
it oscillate?
Answers
Answer:
1.9kHz
Explanation:
Given data
wavelength \(\lambda= 0.32m\)
velocity \(v= 622 m/s\)
We know that
\(v= f* \lambda\\\\f= v/ \lambda\)
substitute
\(f= 622/ 0.32\\\\f= 1943.75\\\\f= 1.9kHz\)
Hence the frequency is 1.9kHz
Answer:
971.2
Explanation:
It was right on acellus :)
22. True or False? When holding the hockey stick properly, players keep two hands on it for control and the blade stays low to the floor for safety. O True O False
Answers
Answer:
true msjnsnaks nsnaufitskclyc86xoyc
Bobo, the clown, wants to set the world record for the furthest range traveled by a clown shot out of a cannon. Write a sentence describing the cannon that Bobo would need to use to accomplish this feat. Be sure to include the necessary initial velocity and the required angle of the cannon. Score: 0 / 1
Answers
In the human cannonball act makes use of of a special type of "cannon" that more safely ejects a person who acts as the "cannonball"
The world record for the longest flight by a human cannonball is approximately 194 feet and therefore the human cannon catapult that Bobo would need is one that would be able to propel him with an initial velocity of more than 120 kilometer per hour (more than the speed of the current record holder) with the cannon directed at an angle 45 degrees above the horizonal
The reason the values given above are correct is as follows:
The world record of the furthest range of the human cannonball is 193 ft. 8.8 inches. The maximum claim for the furthest range of a human cannonball is 200 ft. 4 in. Therefore, to safely set the world record would be to reach a range of 194 feet
The speed with which the world record was accomplished (120 km/jhr) should be expected to be exceeded given, horizontal speed in free fall motion is constant (decreasing in the presence of drag), and the conditions are likely to be more or less similar
In order to reach the furthest range, R, at the possible speed, the angle of inclination of the "cannon" required is 45°, according to the range formula, which is given as follows;
\(Range, \ R = \dfrac{v^2 \times sin(2\cdot \theta)}{g}\)
The maximum range is given where θ = 45, such that sin(2·θ) = sin(90°) = 1
A further range than the world record van be obtained using the above values
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If the mass of an object is 6kg and it’s momentum is -12kgm/s , what is it’s velocity
Answers
hope it helpsp
1. A Ograph A Ograph B Ograph c Which graph represents what happens to the pressure in a tire as air is added to the tire, assuming the temperature is constant?
Answers
Answer:
Explanation:
It's graph A because the pressure in the tire is increasing as the amount of air going into it increases. B says the pressure drops exponentially as air goes in, and C says that the pressure stays the same as air goes in. Pressure in a tire increases proportionally to the amount of air in it.
If you do this quick and and you get it right, I will give you branilest and 5 stars!
1) State Newton’s 3rd Law.
2) While driving down the road, a firefly strikes the windshield of a bus and makes a quite obvious mess in front of the face of the driver. This is a clear case of Newton's third law of motion. The firefly hit the bus and the bus hits the firefly. Which of the two forces is greater: the force on the firefly or the force on the bus?
3) By applying the third law of motion, which force is greater when you push on a wall? Your force, the wall’s force, your force and the wall’s force are equal or the force saved before pushing the wall.
4) If the forces on an object are balanced, the object will do what?
Answers
Answer:
1) If you put force on one side of an object, then there is an equal reaction.
2) Force on the firefly
3) Force saved
4) Will not move
1. A charge of 6.4 C passes through a cross-sectional area or conductor in 2s. How much charge will pass through a cross sectional area of the conductor in 1 min?
Answers
The amount of charge that will pass through the cross-sectional area of the conductor in 1 min is 192 C.
What is the amount of charge?
We can use the formula Q = I * t,
where;
Q is the amount of charge, I is the current, and t is the time.Given that a charge of 6.4 C passes through a cross-sectional area of the conductor in 2 s, we can find the current using the formula:
I = Q / t = 6.4 C / 2 s = 3.2 A
So, the current through the conductor is 3.2 A.
To find the amount of charge that will pass through the cross-sectional area of the conductor in 1 min (60 s), we can use the same formula:
Q = I * t = 3.2 A * 60 s = 192 C
Learn more about charges here: https://brainly.com/question/18102056
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A heating coil operates on 220 V if it draws 15.0 A. Find it's resistance
Answers
Answer:
R ≈ 15 ohms
Explanation:
Using ohm's law equation,
I = V/R, to solve for the resistance of the heating coil.
R = V/I
Known:
V = 220 v = 220 kgm^2s^-3A^-1
I = 15 A
Unknown:
R =?
Solution:
R = (220 kgm^2s^-3A^-1)/ 15.0 A
R = 14.6 kgm^2s^-3A^-2
R ≈ 15 kgm^2s^-3A^-2
R ≈ 15 ohms
A bicyclist travels 69.05 kilometers in 4.332 hours. What is the cyclist's average speed?
Answers
Answer:
v = 15.939 km/h
Explanation:
distance (d) = 69.05 km
time (t) = 4.332 hours
Speed (v) = ?
v = d / t
v = 69.05 / 4.332
v = 15.939 km/h