मराठी

A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car - Science

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प्रश्न

A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car

पर्याय

  • does not change

  • becomes twice to that of initial

  • becomes 4 times that of initial

  • becomes 16 times that of initial

MCQ

उत्तर

does not change

Explanation:

In the given process, the potential energy of the car does not change as it does not depend on velocity.

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पाठ 11: Work and Energy - Multiple Choice Questions [पृष्ठ ६८]

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एनसीईआरटी एक्झांप्लर Science [English] Class 9
पाठ 11 Work and Energy
Multiple Choice Questions | Q 2. | पृष्ठ ६८

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

State the S.I. unit of work and define it.


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  3. the power spent by boy. (Take g = 10 m s-2)

How much work is done when a body of mass m is raised to a height h above the ground?


Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.


In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?


A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more : on the trick or on the bicycle? Give a reason to support your answer.


Give two examples of couple action in our daily life.


P, Q and R are three forces which act as shown in fig.

The point O lies in the same plane. Given, P = Q = R = 10N

(i) Which force has the least moment about O? Give a reason.

(ii)Which force has the greatest moment about O? Give a reason.


A uniform circular motion is an accelerated motion. Justify it.


A boy does work when he pushes against a brick wall. (yes/no).


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Distinguish between work and power.


Complete the following sentences:
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What is meant by power?

Is it easier to turn a steering wheel of large diameter than that of small diameter? Why?

What is meant by equilibrium?

A force is applied on a body of mass 20 kg moving with a velocity of 40 ms−1. The body attains a velocity of 50 ms−1 in 2 seconds. Calculate the work done by the body.


A bucketful of water is to be drawn from a well ______ will be done when a ______ is applied to do this because there will be a ______ of water.
(displacement, work, force)


A force can cause an object to change its ______.


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