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Acceleration

When the acce...

Question

When the acceleration of the particle is positive and is increasing, then its velocity at some instant-
(A) must be positive
(B) must be negative
(C) may be negative
(D) must be zero

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Solution

Acceleration is positive means that the velocity is increasing. This means that a point will come certainly that the velocity will be positive, even when it is negative or not in the beginning. Hence A.

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