A ball is dropped on to the floor from a height of 20m.It rebounds to a height of 10m. If the ball is in contact with the floor for 0.1s seconds, what is the average acceleration during contact.(NSO QUESTION PHYSICS CLASS 9TH MOTION)I will follow you if ur answer seems to be useful
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Friction is caused by the irregularities on the two surfaces in contact. Even those surfaces which appear very smooth have a large number of minute irregularities on them. ... So the force of friction is greater if a roughsurface is involved.
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Friction is caused by the irregularities on the two surfaces in contact. Even those surfaces which appear very smooth have a large number of minute irregularities on them. ... So the force of friction is greater if a roughsurface is involved.
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