an object can have zero average velocity but cannot have zero average speed justify
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Velocity = displacement/time
Speed= distance/time
So if a body has zero displacement in a given time t (initial and final position of the body is same) in that case the velocity of body will be zero.
But, distance is the actual path covered by the body, so speed will be non-zero for the same case.
Speed= distance/time
So if a body has zero displacement in a given time t (initial and final position of the body is same) in that case the velocity of body will be zero.
But, distance is the actual path covered by the body, so speed will be non-zero for the same case.
leonaldo:
not understand sorry plz give an answer in easy language
onsider a thrown ball moving directly upward with velocity V, the earth's acceleration is –G, consider T=0 at the moment of throwing. So the velocity of the ball at any instant T (after throwing) will be V+(-G) T. 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. It is because the object has (-G) acceleration even at velocity 0 that the ball starts falling and finally comes down to hit the ground.
Plz simpler near 4 lines
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