You observe someone pulling a block of mass 39 kg across a low-friction surface. While they pull a distance of 5 m in the direction of motion, the speed of the block changes from 4 m/s to 5 m/s.

Calculate the magnitude of the force exerted by the person on the block.

Answer: D

Explanation:

Answer:

Explanation:

mdeemmkdkwdmwdmw

The 1000 kg car moving at 50 km/h has more momentum than the 5000 kg truck moving at 10 km/h.

Momentum is a product of mass and velocity and is measured in kilogram-meters per second.

The car's momentum is (1000 kg x 50 km/h) 5,000 kg-m/s, while the truck's momentum is (5000 kg x 10 km/h) 500 kg-m/s. The car has 10 times more momentum than the truck. This means that, all other things being equal, it will take more force to stop the car than it will the truck. Momentum is a fundamental concept in physics that describes the quantity of motion of an object.

To learn more about Momentum :

https://brainly.com/question/1042017

#SPJ11

Electrons are the particle will be deflected toward the positive plate as it enters the electric field.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

The field's direction is determined by the direction of the force acting on the positive charge. A positive charge produces a radially outward electric field, whereas a negative charge produces a radially inward electric field.

A physical field that surrounds electrically charged particles and exerts a force on all other charged particles in the field, either attracting or repelling them, is referred to as an electric field.

Hence,electrons are the particle will be deflected toward the positive plate as it enters the electric field.

To learn more about the electric field refer to the link;

https://brainly.com/question/26690770

#SPJ1

Answer:

it is easier to kick a stone than to drag a stone.

Explanation:

the science behind the question is fairly simple.

when you kick and object for say a (rock) you have inertia which is made from you clocking your leg back and swinging it full force forward. when you kick with inertia, you will have a much further travel distance of the object rather than dragging it which is almost set at a certain rate of how fast you are moving (m) and how much inertia you are using by pulling (p)

so m+p=i for inertia. hope this  helped

Answer:

A. Increased self-esteem

Explanation:

I hope this helps :)

Answer:

\(a=\dfrac{v-u}{t}\)

Explanation:

The acceleration of an object is the rate of change of velocity. The mathematical expression for the acceleration of an object is given by :

\(a=\dfrac{v-u}{t}\)

Where

v and u are final and initial velocities

t is time

or we can write acceleration as :

\(a=\dfrac{\Delta v}{\Delta t}\)

Hence, this is the required solution.

Answer:

The applied force on the vehicle is 5,000 N

Explanation:

From the question, we have the following parameters of the motion of the vehicle;

The form of the velocity with which the vehicle is travelling = Uniform velocity

The direction of motion of the vehicle = Along a straight and level stretch of the highway

The combined force which acts as resistance to the vehicle's motion = 5,000 N from rolling friction and resistance of the air opposite to the direction of motion

A vehicle travelling with uniform velocity has zero acceleration, therefore;

The acceleration of the vehicle, a = 0 m/s²

According to Newton's Second Law of Motion, we have;

Force, F = Mass, m × Acceleration, a

∴ The net force of acting on the vehicle, F = m × a

Where;

m = The mass of the vehicle

a = The acceleration of the vehicle = 0 m/s²

∴ F = m × 0 = 0

The net force on the vehicle = 0, therefore;

The applied force + The force of rolling friction and air resistance = 0

We therefore have;

The applied force + 5,000 N = 0

∴ The applied force = 0 - 5,000 N = -5,000 N

The applied force, F = 5,000 N in the direction of motion.

A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to √t.

Work is a change in kinetic energy, it should be noted. Power will therefore be determined as follows:

Power = Work / Time = force × velocity

Work = the change in kinetic energy = 1/2 mv2

If work is proportional to time:

W = t

1/2 mv2 = t

v2 = t

v (speed) = √t

Speed is the rate and direction of an object's movement, as well as the rate and duration at which an object is moving along a path. In all other positions, speed is a scalar value while pace is a vector.

Power is inversely related to t. Because the force is constant, the velocity will be a function of t. As a result, the particle's speed is proportional to √t.

learn more about force here

https://brainly.com/question/13191643

#SPJ4

Answer:

x = 625 m

Explanation:

To solve this exercise we use the kinematics relations

          v² = v₀² - 2 a x

indicate that the train stops therefore its final speed is zero (v = 0)

           0 = v₀² - 2a x

           x = \(\frac{v_o^2}{2a}\)

let's slow down to the SI system

           v₀ = 90 km / h (1000 m / 1km) (1h / 3600 s) = 25 m / s

let's calculate

           x = \(\frac{25^2}{2 \ 0.5}\)

           x = 625 m

AnswerThe current through a toaster connected to a 120-V source is 8.0 A. What power is given off by the toaster? p= 8.0 A : 120V (p=960 W Page 2 7. The resistance of an electric stove eleinent at operating temperature is 11 12.

Explanation:

hope this helps =)

Hello!!

For calculate the resistance of the toaster, we have to applicate formula:

\(\boxed{R= V^{2}/P}\)

\(\textbf{Being:}\)

\(\sqrt{}\) \(P = Potency \ power = 1500 \ W\)

\(\sqrt{}\) \(V = Voltage = 120 \ V\)

\(\sqrt{}\) \(R = Resistance = \ ?\)

\(\text{Then let's \textbf{replace it according} we information:}\)

\(R = (120 \ V)^{2} / 1500 \ W\)

\(R = 9.6 \ \varOmega\)

\(\textbf{Result:}\\\text{The power of the toaster is \textbf{9.6 Ohms}}\)

1. 1.29 x 10⁶ divided by 5.45 x 10⁻⁹ should be written as 2.36697 x 10¹⁴ in scientific notation,

2. 384,000,000 is equal to 3.84 x 10⁸ in scientific notation.

3. 1 AU = 9.297 × 10⁷ miles on converting from AU units into units of miles.

4. 156nm = 156 × 10⁻⁹ m as nano prefix stands for 10⁻⁹.

Scientific notation is a way to express numbers that are very large or very small in a concise and standardized format. It consists of two components: a coefficient and an exponent of 10.

The general form of a number in scientific notation is:

a x 10ᵇ

where "a" is the coefficient, and "b" is the exponent of 10.

1. To divide 1.29 x 10⁶ by 5.45 x 10⁻⁹, we can use the rule of exponentiation. When dividing numbers written in scientific notation, you subtract the exponents and divide the coefficients.

1.29 x 10⁶ / 5.45 x 10⁻⁹ = (1.29 / 5.45) x (10⁶/ 10⁻⁹)

= 0.236697 x 10⁽⁶ ⁻⁽⁻⁹⁾⁾

= 0.236697 x 10¹⁵

= 2.36697 x 10¹⁴ (in scientific notation)

2. The distance from Earth to the Moon is approximately 384,000,000 m. To express this distance in scientific notation, we need to move the decimal point to the second rightmost position, and after that, we raise the power of 10 to the number of digits after the decimal.

384,000,000 = 3.84 x 10⁸ (in scientific notation)

3. 1 AU = 149,597,870.7 km

1 mile = 1.609 km

so AU in miles will be

1 AU = 149,597,870.7 /  1.609 km

1AU = 92,975,680.98 miles

1 AU = 9.297 × 10⁷ miles.

4. 156nm = 156 × 10⁻⁹ m as nano prefix stands for 10⁻⁹.

Therefore using scientific notation,

1. 1.29 x 10⁶ divided by 5.45 x 10⁻⁹ is 2.36697 x 10¹⁴

2. 384,000,000 = 3.84 x 10⁸

3. 1 AU = 9.297 × 10⁷ miles.

4. 156nm = 156 × 10⁻⁹ m

To know more about scientific notations, click here:

https://brainly.com/question/19625319

#SPJ4

All of the above-mentioned symptoms of cognitive stress except for isolation. Option d is correct.

Mental (cognitive) stress is an emotional/physical strain that causes a person to feel irritated, depressed, angry, anxious, and so on.

Cognitive stress is marked by a variety of moods and/or emotions linked to excessive anxiety about money, overall health, job loss, and so on.

All of the above-mentioned symptoms are markers of cognitive stress. In some circumstances, this condition may exacerbate stress.

Loss of memory, loss of concentration, and poor judgment are symptoms that are markers of cognitive stress.

Social isolation has been linked to a variety of mental illnesses, including increased stress, despair, and anxiety.

Hence all of the above-mentioned symptoms of cognitive stress except isolation. Option d is correct.

To learn more about the mental stress refer to the link;

https://brainly.com/question/9086547

Answer:

D

Explanation:

i. The change in the velocity of the car is 12 m/s

ii. The acceleration of the car is 0.2 m/s²

The change in the velocity of the car can be obtained as follow:

Change in velocity = Final velocity - initial velocity

= 32 - 20

= 12 m/s

The acceleration of the car can be obtained as illustrated below:

Acceleration = change in velocity / time

= 12 / 60

= 0.2 m/s²

Learn more about acceleration:

https://brainly.com/question/491732

#SPJ1

i. The elasticity at point \( g \) is the measure of responsiveness or sensitivity of a quantity to changes in another variable at point \( g \).

ii. To determine the elasticity at point \( h \), we first need to establish what quantity we are referring to at point \( h \). Once we have identified the relevant quantity, we can then calculate its elasticity by measuring the responsiveness or sensitivity to changes in another variable at point \( h \).

i. To determine the elasticity at point \( g \), we need specific information about the variables and their relationship. Elasticity is typically calculated as the percentage change in one variable divided by the percentage change in another variable.

ii. Without additional information about the specific variables and their relationship at point \( h \), it is difficult to provide a precise answer. The concept of elasticity requires specific context and variables to be defined in order to calculate or describe it accurately.

To know more about elasticity visit:

https://brainly.com/question/30610639

#SPJ11

a solid cylinder of radius r = 1.0 m and mass 10 kg rotates about its axis. when its angular velocity is 10 rad/s, its angular momentum (in kg⋅m 2 /s) is 50 kg \(m^{2}\) /s.

The angular momentum of a rotating object can be calculated using the formula:

L = I * ω

where L is the angular momentum, I is the moment of inertia and ω is the angular velocity.

The moment of inertia of a solid cylinder rotating about its axis can be calculated using the formula:

I = (1/2) * m * \(r^{2}\)

where m is the mass of the cylinder and r is the radius.

Substituting the values in the formula, we get:

I = (1/2) * 10 kg * 1 \(m^{2}\) = 5 kg \(m^{2}\)

Therefore, the angular momentum,

L = 5 kg \(m^{2}\) * 10 rad/s = 50 kg \(m^{2}\) /s.

Learn more about the angular momentum here:

https://brainly.com/question/15104254#

#SPJ11

During a certain time interval, the net work done on an object is zero joules. We can be certain that the object's final speed is same as its initial speed.

When the net work done on an object is zero, this indicates that the kinetic energy of the body has not changed which means that the object's final speed is same as its initial speed.

Since, we know from the Work energy Theorem that the Change in Kinetic energy is equal to the work done.

So, Zero work indicates that the kinetic energy has not varied which directly signifies that the speed has not change in the course of the interval.

Work is done by the force acting on the body which gets transferred in the kinetic energy of the body.

Kinetic energy is the energy produced due to the motion of the body in the system.

Learn more about Kinetic Energy here, https://brainly.com/question/999862

#SPJ4

Answer:

Acceleration (a) = 0.5 mp\(s^{2}\)

Explanation:

Given,

Object starts from rest, hence the initial velocity of the object is said to be 0

Velocity in the next 8 seconds is 4.0 m/s

u = 0 m/s

v = 4 m/s

t = 8 secs

We know,

a = (v-u)/t

=> a = (4-0)/8

=> a = 4/8 = 0.5 m/\(s^{2}\)

The term "flexibility" refers to an object's ability to take different forms.  High degree of flexibility is found in objects made by flexible materials.

Flexibility is a property that describes the ability of an object or material to bend, stretch, or change shape without breaking or losing its structural integrity. It is a measure of how easily an object can be deformed under the influence of external forces.

The flexibility of an object is determined by its composition, structure, and physical properties. Objects that are made of flexible materials, such as rubber or certain types of plastics, have a high degree of flexibility. They can be bent, twisted, or stretched without permanently deforming or breaking. In contrast, objects made of rigid materials, like metal or glass, have lower flexibility and are less prone to deformation.

Flexibility is an important characteristic in various fields, including engineering, materials science, and biomechanics. It allows for the design of structures and materials that can withstand different forces, adapt to different environments, and perform specific functions effectively.

Learn more about flexible materials here:https://brainly.com/question/9966421

#SPJ11

Answer:

Elephant and the eath because Fg is determined by Mass of an object.. So elephant has greater mass therefore, it's Fg is higher

According the universal  law of gravitation, the gravitational force is directly proportional to the mass of an object.  An elephant weighs so much than a man and thus it will experience larger gravitational force from earth.

Gravitational force is a resistive force by which an object attracts other objects towards its centre of mass. The force exerted by the object depends on the mass and the force experienced by the other object depends on its mass and distance between the two objects.

According to universal law of gravitation, the gravitational force is directly proportional to the mass of the object and distance from the ground. The expression for the law is written as:

\(\rm g = G \frac{M_{1} M_{2}}{r^{2}}\)

Where, G is the universal gravitational constant and M1 and M2 be the masses of two objects which and r be the distance between them. As per this relation gravity decreases with increase in distance and increase with an increase in mass.

Therefore, a massive body such as an elephant will experience greater gravitational force from the earth.

To find more on gravitation, refer here:

https://brainly.com/question/3009841

#SPJ5

Answer:

Carbon is the cornerstone of most biologically produced organic compounds such as proteins, carbohydrates, fats and DNA. All of these compounds contain, in addition to carbon, many other elements, including hydrogen, nitrogen and oxygen.

Explanation:

ok byy make me brilliant

Answer: Solid State

Explanation: Matter in the solid state maintains a fixed volume and shape, with component particles (atoms, molecules or ions) close together and fixed into place.

ANSWER:

28.4 m/s.

STEP-BY-STEP EXPLANATION:

Given:

Actual frequency of the sound waves (f) = 376 Hz

Observed frequency (f') = 410 Hz

Speed of sound (v) = 343 m/s

Speed of observer (vo) = 0 m/s

Speed of police car (vs) = ?

We have that the formula of the Doppler effect is the following:

The speed of the police car is 28.4 m/s.

Viral hemorrhagic fever syndrome, caused by a group of viruses, exhibits periods of dormancy followed by sudden flare-ups due to its zoonotic nature.

The most likely explanation for the pattern of extended periods of no human cases followed by sudden outbreaks with increasing numbers of victims in viral hemorrhagic fever syndrome is the presence of animal reservoirs and/or vectors that are responsible for transmitting the virus to humans. These animal hosts may not always show symptoms of the disease, making it difficult to detect and control outbreaks before they escalate.

Additionally, environmental factors such as changes in temperature and rainfall may also contribute to the resurgence of the virus. It is crucial for public health officials to monitor these potential sources of transmission and take proactive measures to prevent and control outbreaks.

More on hemorrhagic fever: https://brainly.com/question/32413350

#SPJ11

The example of velocity from the question is 10 m/s to the right

Velocity is a measure of the rate of change of an object's position with respect to time. It is a vector quantity, which means it has both a magnitude (speed) and a direction.

Mathematically, velocity is defined as the change in displacement (change in position) divided by the change in time:

Velocity = Δ displacement / Δ time

Alternatively, velocity can be expressed as the derivative of an object's position with respect to time:

Velocity = d displacement / d time

the  SI unit of velocity or it is measured in  meters per second (m/s).

Therefore, This statement specifies both the magnitude (10 m/s) and the direction (to the right) of the object's velocity. It indicates that the object is moving at a constant speed of 10 meters per second in the direction of the positive x-axis.

Learn more about velocity below.

https://brainly.com/question/24445340

#SPJ1

Answer:

3600 J

Explanation:

According to given question

P(rated)=60w

V= 120

I =0.50 A

t=600 second

Now,

Energy can be calculated as :

\(E= VI*t\)

Where,

V is voltage

I is current

t is time in second

Now,

Putting the all value in above equation E

So,

\(E=120*0.5*600\\E=36000 J\)

Therefore, 36000 J energy use up by light bulb

The Cepheid distance method, which involves measuring the period of a type of star called a Cepheid variable and relating this to its luminosity, is only accurate up to a certain point. The method generally fails when attempting to measure distances beyond about 20 Million Parsecs (Mpc).

This is because at greater distances, the light from the Cepheid star dims greatly and becomes too faint to detect with the available technology. Furthermore, the accuracy of the available technology begins to fall off, making it difficult to accurately measure the period or intensity of the Cepheid star, ultimately leading to inaccurate distance measurements.

This limitation has severely hindered our ability to measure distance accurately beyond our local region of the universe, leaving the rest of our universe shrouded in mystery.

know more about light here

https://brainly.com/question/31064438#

#SPJ11