If the velocity of a particle is zero at t=0, then

JEE Main Physics question

If the velocity of a particle is zero at , then

(A)The acceleration at must be zero
(B)If the acceleration is zero from to s, the speed is also zero in this intervalCorrect
(C)If the acceleration is zero from to s, the displacement is also zero in this intervalCorrect
(D)If the speed is zero from to s, the acceleration is also zero in this intervalCorrect

Answer: (B),(C),(D)

(A) is false — at a single instant does not force at that instant (e.g. a ball at its highest point has but ). (B), (C): if throughout and , then for

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Question ID VK-152149