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Can you have zero velocity and nonzero average acceleration? zero velocity and nonzero acceleration? please give example.

Can you have zero velocity and nonzero average acceleration? zero velocity and nonzero acceleration? please give example.

Grade:11

1 Answers

Ashwin
41 Points
6 years ago
Yes it is possible. A ball thrown in air is a perfect example.accleration of ball is always g but at the highest point velocity is zero.
 
Also a car starting from rest has zero velocity but non zero acceleration. if it had zero acceleration it would never begin to move.
 
Ball one can be explained as above – 
To explain, say that u throw a ball at velocity V upwards , the earth's acceleration is -G. consider T=0 at the moment of throwing. V+(-G)T is the velocity of the ball at any instant T (after throwing). At the time T=V/(+G) *we have the ball's velocity 0 but the ball persistently has -G acceleration* all along duration of flight until it hits ground . *Its because the object has (-G) acceleration even at velocity 0 that the ball starts falling and finally comes down to hit the ground*.

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