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Tardigrade
Question
Physics
A long spring, when stretched by a distance x, has potential energy U. On increasing the stretching to rue, the potential energy of the spring will be
Q. A long spring, when stretched by a distance x, has potential energy U. On increasing the stretching to rue, the potential energy of the spring will be
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CMC Medical
CMC Medical 2007
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A
n
U
B
n
U
C
n
2
U
D
n
2
U
Solution:
Potential energy of the spring
U
=
2
1
k
x
2
?(i) and
U
=
2
1
k
(
n
x
)
2
⇒
U
=
n
2
2
1
k
x
2
∴
U
=
n
2
U
[From Eq. (i)]