 # NCERT Exemplar Solutions Class 9 Science Solutions for Work and Energy - Exercise in Chapter 11 - Work and Energy

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

(a) does not change

(b) becomes twice to that of initial

(c) becomes 4 times that of initial

(d) becomes 16 times that of initial

The answer is (a) does not change

Explanation:

Potential energy is the product of height, mass, and gravity. Hence height is a factor in determining potential energy. Here the height does not change hence potential energy of the car does not change.

Video transcript
"hello everyone welcome to lido learning i am gurpreet your science tutor today's question is a car is accelerated on a leveled road and attains a velocity four times of its initial velocity in this process the potential energy of the car a does not change b becomes twice to that of initial c becomes four times that of the initial and d becomes 16 times that of the initial so here four options have been given to you and we have to find out the correct option since potential energy is the product of height mass and gravity hence height is a factor that determines potential energy okay so here the height does not change hence the potential energy will also not change so the correct option for this is option a the potential energy will not change for more such videos please subscribe leader learning and for any doubts drop a comment thank you"
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