Physics-
General
Easy
Question
Choose the wrong statement
- Zero velocity of a particle does not necessarily mean that its acceleration is zero.
- Zero acceleration of a particle does not necessarily mean that its velocity is zero.
- If speed of a particle is constant, its acceleration must be zero.
- none of these
The correct answer is: If speed of a particle is constant, its acceleration must be zero.
If speed, that is the magnitude of velocity is constant, where as the direction of velocity changes, we cannot say that velocity is constant. Therefore the particle has non-zero acceleration
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