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Question

The velocity of a body can change
  1. if its acceleration is zero.
  2. if its acceleration is non-zero.
  3. None of the above.
  4. Both A & B

A
if its acceleration is non-zero.
B
Both A & B
C
if its acceleration is zero.
D
None of the above.
Solution
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Acceleration is defined as change of velocity in unit time. So if acceleration is zero, there is no change of velocity, the body is moving with a constant velocity.

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