The triceps muscle in the back of the upper arm extends the forearm. This muscle in a professional boxer exerts a force of 2135 N with an effective perpendicular lever arm of 3.65 cm , producing an angular acceleration of the forearm of 130.0 rad / s2 . What is the moment of inertia of the boxer's forearm
Answers
The moment of inertia of the boxer's forearm is approximately 0.5991 kg·m².
To calculate the moment of inertia of the boxer's forearm, we can use the formula: Torque = Moment of Inertia × Angular Acceleration
Given:
Force (F) = 2135 N
Lever Arm (r) = 3.65 cm = 0.0365 m
Angular Acceleration (α) = 130.0 rad/s²
The torque (τ) is given by the product of the force and the lever arm:
Torque = Force × Lever Arm
Torque = 2135 N × 0.0365 m
Torque = 77.8775 N·m
Now,
Moment of Inertia = Torque / Angular Acceleration
Moment of Inertia = 77.8775 N·m / 130.0 rad/s²
Moment of Inertia ≈ 0.5991 kg·m²
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Related Questions
What are the fundamental units involved in a unit of the given derived quantities
Density
Acceleration
Force
Pressure
Work
Answers
Answer:
Density → Mass and Length.
Acceleration → Length and Time.
Force → Mass, Length and Time.
Pressure → Mass, Length and Time.
Work → Mass, Length and Time.
This is a question on my physics test :)
Can any1 help me? if you can, please give an explanation
Answers
Answer:
119.6 J/Kg°C
Explanation:
Data obtained from the question include:
Mass of substance (ms) = 170 g
Initial temperature of substance (Ts) = 120 °C
Volume of water = 200 mL
Initial temperature of water (Ts) = 10 °C
Temperature of the mixture (T2) = 12.6 °C
Density of water = 1 g/mL
Specific heat capacity of water (Cw) = 4200J/Kg°C
Specific heat capacity of substance (Cs) =..?
Next, we shall determine the mass of water. This can be obtained as follow:
Volume of water = 200 mL
Density of water = 1 g/mL
Mass of water =..?
Density = mass /volume
1 = mass /200
Cross multiply
Mass of water = 1 x 200
Mass of water = 200 g
Convert 200 g of water to Kg
Mass of water = 200/1000 0.2 Kg
Mass of water = 0.2 Kg
Now, we obtained the specific heat capacity of the substance using the following formula:
MwCw(T2 – Tw) + MsCs(T2 – Ts) = 0
Mass of water = 0.2 Kg
Initial temperature of water (Ts) = 10 °C
Specific heat capacity of water (Cw) = 4200J/Kg°C
Temperature of the mixture (T2) = 12.6 °C
Mass of substance (ms) = 170 g = 170/1000 = 0.17 Kg
Initial temperature of substance (Ts) = 120 °C
Specific heat capacity of substance (Cs) =..?
MwCw(T2 – Tw) + MsCs(T2 – Ts) = 0
0.2× 4200(12.6 – 10) + 0.17×Cs×(12.6 – 120) = 0
840(2.6) + 0.17Cs(– 107.4) = 0
2184 – 18.258Cs = 0
Rearrange
2184 = 18.258Cs
Divide both side by the coefficient of Cs i.e 18258
Cs = 2184/18.258
Cs = 119.6 J/Kg°C
Therefore, the specific heat capacity of the substance is 119.6 J/Kg°C
the angular velocity of a rotating rigid body increases from 500 to 1500 rev/min in 120 s. (a) what is the angular acceleration of the body? (b) through what angle does it turn in this 120 s?
Answers
The angular acceleration of the body & through certain angle is 0.87266 rad/sec² and 12566.8rad respectively.
Given -angular velocity of a rotating rigid body increases from 500 to 1500 rev/min .
Time= 120s
To find - Angular acceleration and angle
Principle : We have to convert rev/min to rad/sec .
ωf= ωi + αt
ωf- ωi = αt
α= [ ωf- ωi ]/ t⇒angular acceleration formula
ΔФ=ωi t + αt²/2⇒ angle deviation formula
Calculations-
Conversion of Rev/Min to rad/Sec -
ωi= 500 rev/min
= 500 x 2π rad/rev x 1min/60sec = 52.3598 rad/sec
ωf= 1500 rev/min
=1500 x 2π rad/rev x 1min/60sec = 157.079rad/sec
ωi=52.3598 rad/sec
ωf=157.079rad/sec
Now , to compute angular acceleration- α= [ ωf- ωi ]/ t
= [157.079rad/sec- 52.3598 rad/sec]/120
α=0.87266 rad/sec²
Now to compute angle deviated -ΔФ=ωi t + αt²/2
=52.3598 x 120 + [0.87266 x 120 x120]/2
ΔФ= 12566.8rad
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although a magnet can change the direction of travel of an electron beam, it cannot change its:
Answers
Although a magnet can change the direction of travel of an electron beam, it cannot change its charge. The charge of an electron is a fundamental property and is not affected by magnetic fields.
What is a magnet?A magnet is an object or material that produces a magnetic field, which can exert attractive or repulsive forces on other magnets or magnetic materials. It has a north pole and a south pole with opposite magnetic polarities. Magnets can be natural or artificial, and they are used in numerous applications like electric motors, generators, speakers, magnetic storage devices, and medical imaging machines. They play a crucial role in various industries and scientific fields where the manipulation of magnetic fields is necessary.
They are also commonly used in magnetic compasses for navigation and in various industrial and scientific applications where the manipulation of magnetic fields is required.
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To what height, h, would the pendulum bob rise after a single swing if it was being released from the height of 0.80 m
Answers
Answer:
0.80 m
Explanation:
Neglecting friction, the total mechanical energy of the pendulum is constant.
E = K + U where K = kinetic energy and U = potential energy.
At its release point of 0.80 m, the pendulum bob has a mechanical energy which is equal to its potential energy, since, its initial kinetic energy is zero. By the time the bob swings to the other end, it has a mechanical energy equal to it initial potential energy since total energy is conserved.
Neglecting friction, the pendulum bob would swing back to its original height of 0.80 m since the total mechanical energy is conserved and at its highest point, it is purely potential energy.
So, the height the pendulum bob swings to after release from a height of 0.80 m neglecting fiction is 0.80 m.
forces of 10 pounds and 14 pounds act on each other with an angle of 50°. the magnitude of the resultant force
Answers
The resultant force is 10.77 pounds.
We need to know about vector to solve this problem. Force is included to vector because it has magnitude and also direction. The resultant force can be determined using cosine law. It can be written as
F² = F1² + F2² - 2F1 . F2 cos(θ⁰)
From the question above, we know that:
F1 = 10 pounds
F2 = 14 pounds
θ = 50°
By substituting the parameter, we get
F² = F1² + F2² - 2F1 . F2 cos(θ⁰)
F² = 10² + 14² - 2. 10 . 14 cos(50⁰)
F² = 100 + 196 - 280 . 0.64
F² = 100 + 196 - 280 . 0.64
F² = 116.02
F = 10.77 pounds
Hence, the resultant force is 10.77 pounds.
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What does ceteris paribus mean?
A. other things remain unequal
B. other things remain constant
C. other things remain irregular
D. other things remain unbalanced
Answers
Answer:
other things remain constant
Explanation:
Answer:
B) Other things remain constant.
Explanation:
For edmentum users.
Calculate the wavelength, in meters, of electromagnetic radiation needed to remove an electron from the valence shell of an atom of the element.
Answers
The wavelength of the electromagnetic radiation needed to remove an electron from the valence shell of an atom of the element is 2.7522m.
The electromagnetic (EM) field's waves, which travel across space carrying momentum and electromagnetic radiant energy, make up electromagnetic radiation (EMR). It consists of X-rays, gamma rays, microwaves, infrared, visible light, ultraviolet, and radio waves. These waves are all components of the electromagnetic spectrum.
We are given that,
Speed of light = c = 299 792 458 m
The frequency of electron = f = 1.09 × 10⁸ s⁻¹
The following equation can be used to determine the wavelength of a radio wave
Wavelength = λ = c/f
λ = c/f
λ = 299 792 458 m/s/ 1.09 × 10⁸ s⁻¹
λ = 2.7522m
Therefore the wavelength of the electromagnetic radiation would be 2.7522m.
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1.39 A of current flow across a
144 Ohm resistor. How much
voltage is being applied?
Answers
V = 200.16 volts
Explanation:
V= IR
= (1.39 A)(144 ohm)
= 200.16 volts
Answer:
200.16
Explanation:
acellus
The radius of the sun is 695,700 km and the mass of the sun is 2x1030 kg. What would the force of gravity be on a 60 kg person "standing" on the surface of the sun? What is the acceleration of gravity at the surface of the sun?
Answers
a) The gravitational force is 1.7 * 10^4 N.
b) The acceleration due to gravity is 277 m/s^2.
What is the gravitational force?We know that the gravitational force is the force of attraction that acts in the universe between any two masses that are close to each other. We can see that we have the following information;
Mass of the sun = 2 x 10^30 kg
Mass of the person = 60 kg
Radius of the sun = 695,700 km or 695,700000 m
Force of gravity = Gm1m2/r^2
G = gravitational constant
m1 = mass of the sun
m2 = mass of the person
r = radius of the sun
Hence;
F = 6.67 x 10^-11 * 2 x 10^30 * 60/( 695,700000)^2
F = 8 * 10^21 /4.8 * 10^17
F = 1.7 * 10^4 N
The acceleration due to gravity is gotten from;
g = Gm/r^2
g = 6.67 x 10^-11 * 2 x 10^30/( 695,700000)^2
g = 1.33 * 10^20/4.8 * 10^17
g = 277 m/s^2
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A system is heated with 134 J of energy and, at the same time, the system expands, doing 89 J of work. What is the change in internal energy of the system, in Joules
Answers
The change in internal energy of the system after the heat is added and the system expands doing work to the surrounding is 45 J.
Change in internal energy of the system
The change in internal energy of the system is determined by applying the first law of thermodynamics as shown below;
ΔU = q - w
where;
ΔU is the change in the internal energyq is heat added to the systemw is work done to the surroundingsΔU = 134 J - 89 J
ΔU = 45 J
Thus, the change in internal energy of the system after the heat is added and the system expands doing work to the surrounding is 45 J.
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a scientist on earth drops a hammer and a feather at the same time an astronaut on the moon drops a hammer and a feather. which result is expected?
Answers
The answer depends if air resistance is ignored. If ignored, the feather and hammer on moon and earth will reach the ground at the same time with respect to their gravitational force (earth > moon)
If air resistance is not ignored, the hammer will reach the ground first on both earth and moon
When a scientist on Earth drops a hammer and a feather at the same time, the expected result is that the hammer would hit the ground first.
When an astronaut on the moon drops a hammer and a feather at the same time, they would hit the ground at the same time. This is because the gravitational pull on the moon is weaker than that on Earth, so objects fall at the same rate regardless of their mass.
What is gravity?Gravity is the force that exists between any two masses, any two bodies, any two particles. It is an attraction force that always exists between objects, and the magnitude of the force depends on the masses of the objects and the distance between them. On the surface of the earth, gravity acts to pull all objects towards the center of the earth, resulting in weight of objects on the surface of the earth.
What is free fall?Free fall refers to the motion of an object falling under the influence of gravity. When an object is dropped from a certain height, it will fall at an accelerating rate towards the ground, until it hits the ground. Objects fall at the same rate regardless of their mass.
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The system of equations y = negative 3 x + 2 and y = one-half x minus 6 is shown on the graph below.What is a reasonable estimate for the solution?
Answers
Answer:
2 and one-third, negative 4 and three-fourths
Step-by-step explanation:
the solution is the point at which the system of equations are equal to each other, meaning where they intersect
You would like to know whether silicon will float in mercury and you know that can determine this based on their densities. Unfortunately, you have the density of mercury in units of kilogrammeter3 and the density of silicon in other units: 2.33 gramcentimeter3. You decide to convert the density of silicon into units of kilogrammeter3 to perform the comparison. By which combination of conversion factors will you multiply 2.33 gramcentimeter3 to perform the unit conversion?
Answers
Answer:
The fourth one
Explanation:
It's the only one to represent volume (cm³ vs. m³) and have kilograms in the denominator.
Have a wonderful weekend!
If we want to convert the density of the silicon from 2.33 gram/ centimeter3 to kilogram /meter3 unit we have to perform the operation
(1 kilogram/ 10³ grams) ×(1 centimeter/10⁻² meters)×(1 centimeter/10⁻² meters)×(1 centimeter/10⁻² meters)
Therefore the correct answer is option B.
What is density?
It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.
As given in the problem we have to convert the density of the silicon from 2.33 gram/ centimeter3 to kilogram /meter3 unit
1 kilograms = 1000 grams
1 meter = 100 cm
2.33 gram/ centimeter3 = 2.33×10 ⁻³kilogram / 10 ⁻⁶meter3 unit
= 2.33×10³kilogram / 10 ⁻⁶meter3 unit
Thus, the correct answer is option B.
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A laser beam is directed at the Moon, 380,000 km from the Earth. The beam diverges at an angle of \thetaθ of 0.8 x 10-5 rad. What diameter spot, in m, will it make on the Moon?
Answers
Answer:
3040 m
Explanation:
The formula to apply here is ;
d=∅*r where
d is the diameter of the spot , ?
∅ is angle of divergence in radians, = 0.8 * 10⁻⁵rad
r is distance of Moon from Earth, =380,000 km
Applying the formula as;
d=∅*r
d= {0.8 *10⁻⁵} * 380,000 * 1000
d= 3040 m
Where are alkaline earth metals found on the periodic table? Group 1 Group 2 Groups 3–12 Group 17'
Answers
Answer:
B- Group 2... It says my answer is too short so how ya'll doing today?
why is physics to study the heat absorbed by the ocean
Answers
Answer:
Heat is a source of energy
Explanation:
Just took the test
Which observations correctly describe the second law of thermodynamics? check all that apply.
thermal energy that is not used to do work is often released to the surroundings.
thermal energy flows from a cooler object to a warmer object.
thermal energy flows from a warmer object to a cooler object.
thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.
thermal energy flows when two objects in contact have a temperature difference.
answers: 1,3,4,5
Answers
Answer:
I would agree with the answers 1, 3, 4, 5
Obviously energy will not spontaneously flow from a cooler object to a warmer object
Answer:
A. Thermal energy that is not used to do work is often released to the surroundings.
C. Thermal energy flows from a warmer object to a cooler object.
D. Thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.
E. Thermal energy flows when two objects in contact have a temperature difference.
Explanation:
Got it right on edge 23
ysical Science A
Calculate the volume of this regular solid
What is the volume of the cone? Round your answer to
the nearest hundredth
cm?
4.5 cm
В.
3 cm
Intro
Done
Answers
4.5 Cm
Hope this help
Answer: 42.41 cm
Explanation:
The chemical combination of atom a and atom b would result in
Answers
Answer:
A molecule
Explanation:
Which type of wave is a combination of two waves?
Answers
Answer:
A composite wave
Answer:
surface waves
Explanation:
a baseball player hits a ball in such a way that it leaves bat with an initial speed of 40.0 m/s at 38.0 degrees.
a. Find the horizontal and vertical components of the initial velocity.
b. What is the horizontal and vertical velocity of the ball at t=2.00 seconds.
c. What is the horizontal and vertical velocity of the ball at t=3.00 seconds.
d. What is the ball's motion at t=4.00s? (upward/downward)
e. How long did it take for the ball to reach maximum height?
f. Compute the ball's Maximum height.
g. How long will it take for the ball to finally hit the ground?
h. Find the ball's range.
Hellllppppp asap
Answers
Answer:
d
Explanation:
if 2.5 minutes is the maximum access time for a magnetic tape, ____ is the average access time.
Answers
If 2.5 minutes is the maximum access time for a magnetic tape, 1.25 minutes is the average access time.
What is access time for a magnetic tape?
how long it takes to get a piece of information out of storage is access time. If the file holding the necessary data is on magnetic tape instead of a magnetic disc, the access time may be measured in minutes rather than in milliseconds.
The average access time is the sum of the average seek time, the command overhead, and the average latency.
Given that: the maximum access time for a magnetic tape = 2.5 minutes.
Hence, the the average access time = 2.5 minutes/2 = 1.25 minutes.
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The parking brake on a 1200kg automobile has broken, and the vehicle has reached a momentum of 7800kg.M/s. What is the velocity of the vehicle?
Answers
v=p/m
So you would do:
7800/1200=6.5
So the answer is:
6.5 m/s
Hope this helps :)
Help me please!!!!!!!!!!!!!!!!!!!!!!
Answers
According to the information we can infer that the country that was formed from Yugoslavia was Croatia (option C).
What country was formed from Yugoslavia?According to the information from different sources we can infer that the country that was formed from Yugoslavia was Croatia. This country is located in southeastern Europe that gained independence in 1991 after the breakup of Yugoslavia.
Additionally, it was one of the six republics that made up Yugoslavia, along with Bosnia and Herzegovina, Montenegro, North Macedonia, Serbia, and Slovenia. Following a period of political and social unrest, Croatia declared its independence from Yugoslavia, which ultimately led to the Croatian War of Independence.
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. if is the impulse of a particular force, what is (a) the momentum (b) the change in momentum (c) the force (d) the change in the force
Answers
If the impulse of a particular force is represented by the symbol J, then:
(a) the momentum is equal to J.
(b) the change in momentum is also equal to J.
(c) J is equal to the product of F and Δt.
(d) The force is equal to the change in momentum divided by the time interval over which the force acts.
(a) Momentum: Impulse (J) is equal to the change in momentum (Δp). So, if you know the impulse, you can find the momentum before and after the application of force.
(b) Change in momentum: As mentioned above, the change in momentum (Δp) is equal to the impulse (J).
(c) Force: Impulse (J) is also equal to the product of force (F) and the time interval (Δt) during which the force is applied. To find the force, you can use the equation J = F × Δt, and you'll need to know the time interval.
(d) Change in force: The change in force would require additional information, such as the initial and final force acting on the object, or the relationship between force and time. The impulse is equal to the change in momentum, and the force is equal to the change in momentum divided by the time interval over which the force acts.
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Why does Mars provide the best opportunity for habitation by humans?
Answers
Answer:
Mars is an opportunity for humans to carry forward the light of consciousness, plus it is the closest planet like earth, it has land humans can land on and although its small, theres still water
During an observation, it was noticed that light diffracts as it passes through small slits in a barrier. What does this evidence reveal about light? (2 points)
Answers
Answer:
It reveals that light is a wave
Explanation:
Diffraction is the property of a wave in which there is a bending of the wave about the corners of an obstacle or aperture into the geometrical shadow of the obstacle or aperture.
This simply implies that a wave bends or spreads out when it passes through openings. Since the light diffracts through small slits and diffraction has been shown to occur in water waves and sound waves, this property of diffraction can only be characteristic of a wave and thus, this evidence reveals that light is a wave.
Answer:
It shows that light can travel in different wavelengths.
Explanation:
Light is similar to a wave in the way that it travels in a straight line, but when it is passing through the slits, it diffracts due to this difference. Therefore, light refracts in the same way as a wave would, and it is a mode of transferring energy. The light travels in a way similar to a wave
During spring semester at MIT, residents of the parallel buildings of the East Campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. A balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. Assume that the stretching of the hose obeys Hooke's law with a spring constant of 88.0 N/m. If the hose is stretched by 4.20 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length
Answers
Answer:
The work done on the hose by the time the hose reaches its relaxed length is 776.16 Joules
Explanation:
The given spring constant of the of the spring, k = 88.0 N/m
The length by which the hose is stretched, x = 4.20 m
For the hose that obeys Hooke's law, and the principle of conservation of energy, the work done by the force from the hose is equal to the potential energy given to the hose
The elastic potential energy, P.E., of a compressed spring is given as follows;
P.E. = 1/2·k·x²
∴ The potential energy given to hose, P.E. = 1/2 × 88.0 N/m × (4.20 m)²
1/2 × 88.0 N/m × (4.20 m)² = 776.16 J
The work done on the hose = The potential energy given to hose, P.E. = 776.16 J
What is moment of inertia of an object?
Answers
The moment of inertia of an object is the measure of its resistance to rotational motion.
When an object is rotating around an axis, its moment of inertia determines the amount of torque required to change its angular acceleration. It depends on the distribution of mass around the axis of rotation and the shape of the object. The moment of inertia increases as the mass is distributed farther from the axis, which makes it more difficult to change the rotation speed.
For example, a thin ring and a solid disk with the same mass and radius have different moments of inertia, as the mass of the disk is concentrated at a greater distance from the axis. Moment of inertia is an important property in mechanics, as it explains how objects behave under rotational forces.
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