Question

# Give example where (a) the velocity of a particle is zero but its acceleration is not zero, (b) the velocity is opposite in direction to the acceleration, (c) the velocity is perpendicular to the acceleration.

Solution

## $$(a)$$ At the top most point when a particle is thrown vertically upward, $$v=0$$ and $$a=-g.$$$$(b)$$ When a body is thrown up, then while going up, velocity is upward but the acceleration is vertically downward.$$(c)$$ When a body is moving on a circular path with uniform speed, then its velocity is tangential and the acceleration is radial( centripetal acceleration). That is velocity is normal to acceleration.Physics

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