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NCERT Exemplar Solutions Class 9 Science Solutions for Work and Energy - Exercise in Chapter 11 - Work and Energy
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A body is falling from a height h. After it has fallen from a height h2, it will possess
(a) only potential energy
(b) only kinetic energy
(c) half potential and half kinetic energy
(d) more kinetic and less potential energy
Answer:
The answer is (c) half potential and half kinetic energy
Explanation:
When the body is at height h, its potential will be a hundred percent and kinetic energy will be zero. In the same way, when the body reaches the ground its potential energy will be zero and kinetic energy will be maximum. At height h/2 both potential energy and kinetic energy of the body will behalf.
Video transcript
"hello everyone welcome to leader
learning
i am gurpreet your science tutor
today's question is a body is falling
from a height
h after it has fallen from a height
h2 it will possess
a only potential energy
b only kinetic energy
and c half potential and half kinetic
energy
and d more kinetic and less potential
energy
so four options have been given to you
and out of the four options you have to
tell
the correct option
so let us start our answer
when the body
is at height
h its potential
energy will be
100
and kinetic energy here will be
zero
but in case when the body
is reaching the ground
its potential energy
will be zero
and kinetic energy
will be maximum
okay so
at the height h2
from the question both potential energy
and kinetic energy
will be
half
clear hence the correct option
for the question becomes that is
option c half the potential
and half will be the kinetic energy
for more such videos please subscribe
leader learning
and for any doubts drop a comment thank
you"
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