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Question
Physics
In SHM restoring force is F = -kx , where k is force constant, x is displacement and A is amplitude of motion, then total energy depends upon
Q. In
S
H
M
restoring force is
F
=
−
k
x
, where
k
is force constant,
x
is displacement and
A
is amplitude of motion, then total energy depends upon
2516
185
MHT CET
MHT CET 2007
Oscillations
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A
k
,
A
and
M
15%
B
k
,
x
,
M
18%
C
k
,
A
56%
D
k
,
x
11%
Solution:
In SHM, the total energy
=
potential energy+ kinetic energy
or
E
=
U
+
K
=
2
1
m
ω
2
x
2
+
2
1
m
ω
2
(
A
2
−
x
2
)
=
2
1
m
ω
2
A
2
=
2
1
k
A
2
where, k = force constant= m
ω
2
Thus, total energy depends on k and A