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Manipal Entrance Test 2013 Physics Paper
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© examsnet.com
Question : 7
Total: 60
Simple pendulum of length I has a maximum angular displacement θ. The maximum kinetic energy of the bob is
mgl (1 - cos θ)
0.5 mgl
mgl .
2 mg
Validate
Solution:
In the equilibrium position energy is. in the form of kinetic energy.
Height of bob at maximum angular displacement is
h
=
l
−
l
cos
θ
=
l
(
1
−
cos
θ
)
Also PE = KE
mgh
=
mgl
(
1
−
cos
θ
)
© examsnet.com
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