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Question

The bob in a simple pendulum of length is released at t=0 from the position of small angular displacement θ. Linear displacement of the bob at any time t from the mean position is given by
  1. θcosglt
  2. gltcosθ
  3. gsinθ
  4. θsinglt

A
gltcosθ
B
θsinglt
C
θcosglt
D
gsinθ
Solution
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x=lcoswt

=lgLtcosθ

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