NCERT Solutions Class 9 Science Solutions for Work and Energy - Exercise 11.5 in Chapter 11 - Work and Energy

Question 18 Work and Energy - Exercise 11.5

A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?

When the object falls freely towards the bottom, its mechanical energy decreases and K.E. will increase, because the object touches the bottom, all its mechanical energy gets reborn into K.E. Because the object hits the laborious ground, all its K.E. gets reborn into heat and sound energy. It may also deform the bottom relying upon the character of the ground and therefore the quantity of K.E. possessed by the thing.

Video transcript
"hello students welcome to leader learning this is ashwini i teach science at pedo so here we have a question that is a freely falling object eventually stops on reaching the ground what happens to its kinetic energy so suppose there's a ball this is falling like suppose this object okay this falling down and it suddenly stop while reaching the ground so what happens to its kinetic energy here when the objects freely falls down towards the bottom its mechanical energy decreases and in return the object touches the ground touches the bottom so its mechanical energy decreases and kinetic energy increases as this object touched the ground so due to laborious ground touch it will hit the ground and this kinetic energy was converted into heat and sound so this is all about this question if you have any doubt then please put it down in the comment section for more such video solutions please subscribe leader learning thank you"
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