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Pendulum in Non Inertial Frame

A simple pend...

Question

A simple pendulum is oscillating without damping. When the bob is at extreme position, acceleration vector is correctly shown by

A

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B

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C

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D

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Solution

The correct option is B
All forces along the string cancel each other, hence
$T = m g cos θ$
Restoring acceleration as well as force is tangantial to the path of the bob of pendulum.
$F_{n e t} = m g sin θ$
$a_{n e t} = g sin θ$ along tangent

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Pendulum in Non Inertial Frame

Standard XII Physics

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