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Accleration-time graph of a particle exe...

Accleration-time graph of a particle executing SHM is as shown in figure. Select the correct alternatives(s).

A

Displacement of particle at 1 is negative

B

Velocity of particle at 2 is positive

C

Potential energy of particle at 3 is maximum

D

Speed of particle at 4 is decreasing

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The correct Answer is:
ABCD
At 1 acceleration is positive , therefore displacement is negative.
At 2 acceleeation of particle is zero but after some time acceleration is negative.
At 3 acceleeation of particle is maximum. Therfore P.E. is maximum.
At 4 acceleration is positive and its increasing in magnitube.
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