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Byju's Answer
Standard VIII
Chemistry
Potential Energy
A mass of 1...
Question
A mass of
10
k
g
dropped from a height
50
c
m
. Find its kinetic energy just before touching ground.
A
20
J
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B
0
J
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C
50
J
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D
5
J
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Solution
The correct option is
D
50
J
We know that its potential energy will covert to
K
.
E
just before touching the ground.
So just before touching the ground loss in potential energy =gain in
K
.
E
Here
h
=
50
c
m
or
0.5
m
So
K
.
E
=
m
g
h
=
10
×
10
×
0.5
=
50
J
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