The velocity of a particle is zero at t = 0.
a) The acceleration at t = 0 must be zero.
b) The acceleration at t = 0 may be zero.
c) If the acceleration is zero from t=0 to t=10s, the speed is also zero in this interval.
d) If the speed is zero from t = 0 to t = 10 s the acceleration is also zero in this interval.

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a, b & d are correct

a, b & c are correct

b, c & d are correct

a, c & d are correct

answer is B.

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Detailed Solution

The acceleration at t = 0 may be zero, if the velocity continuous to remain zero then the acceleration can be zero.

If acceleration is zero that means their is no change in velocity, so velocity remains zero.

Speed remains zero from t =0 and t=10sec that means the particle is at rest in this interval so the acceleration will be zero.

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