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A pendulum bob has a period 24 s. Its v...

A pendulum bob has a period 24 s. Its velocity 4 s after it has passed the mean position is `6.28" cm s"^(-1)`. The amplitude of its motion is :

A

12 cm

B

24 cm

C

48 cm

D

40 cm

Text Solution

Verified by Experts

The correct Answer is:
C
Use `v=r omega cos omegat`.
`6.28=r""(2pi)/(24).cos((2pi)/(24).4)`
`implies" "r=48` cm.
Hence correct choice is ( c ).
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