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Question

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


A

does not change

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B

becomes twice to that of initial

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C

becomes 4 times that of initial

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D

becomes 16 times that of initial

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Solution

The correct option is A

does not change


Step 1: Given

Initial velocity=u

Final velocity=4u

Step 2: Concept used

Potential energy is given by, PE=mgh

Where, m,g,h are the mass of the body, gravitational acceleration and the height at which the body is kept respectively.

Step 3: Determine the change in potential energy

  1. We can observe that the potential energy does not depend on the velocity.
  2. Potential energy is the energy stored by a body due to the virtue of its height.

Hence, option A is the correct option.


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