Questions
A ball falling freely from a height of 4.9 m ,hits a horizontal surface. If e = 3/4, then the ball will hit the surface second time after
detailed solution
Correct option is B
Velocity on hitting the surface =2gh=2×9.8×4.9 = 9.8 ms-1Velocity after first bounce, v = 34×9.8ms-1Time taken from first bounce to the second bounce = 2vg =2×34×9.8×19.8=1.5 sTalk to our academic expert!
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A steel ball is released from a height of 27 m onto a fixed horizontal steel plate. On bouncing the ball rises to a height of 3 m. Then co-efficient of restitution is
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