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NCERT Solutions Class 9 Science Solutions for Work and Energy - Exercise 11.5 in Chapter 11 - Work and Energy
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Question 18 Work and Energy - Exercise 11.5
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
Answer:
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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