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A particle is in linear S.H.M. between t...

A particle is in linear S.H.M. between two points A and B, 10 cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when it is.
(a) at the end A
(b) at the end B,
(c) at the mid point of AB going towards A,
(d) at 2 cm away from B going towards A,
(e) at 3 cm away from A goiing towards B, and
(f) at 4 cm away from A going towards A.

Text Solution

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1. At the end A particle is at extreme position hence velocity is zero. As it is acted up on by restoring force towards mean position its acceleration and force acting on it are positive
2. At the end B velocity =0, acceleration and force are negative
3. At the mid point of AB (at mean position O) velocity is maximum andnegative as the particle moves towards A. acceleration and force are zero.

Velocity is negative, acceleration and force are positive.
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