A metal plate of mass 200 gm is balanced in mid – air by throwing 40 balls /sec, each of mass 2 gm, vertically upwards from below. The balls rebound with the same speed with which they strike the plate. Find the velocity with which the balls strike the plate. (Take g=9.8 m/s2)

A metal plate of mass 200 gm is balanced in mid – air by throwing 40

1.	A metal plate of mass 200 gm is balanced in mid – air by throwing 40 balls /sec, each of mass 2 gm, vertically upwards from below. The balls rebound with the same speed with which they strike the plate. Find the velocity with which the balls strike the plate. (Take g=9.8 m/s2)
Answer» A metal plate of mass $200 gm$ is balanced in mid – air by throwing 40 balls /sec, each of mass $2 gm$ , vertically upwards from below. The balls rebound with the same speed with which they strike the plate. Find the velocity with which the balls strike the plate. (Take $g = 9.8 m / s^{2}$ )

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A metal plate of mass 200 gm is balanced in mid – air by throwing 40 balls /sec, each of mass 2 gm, vertically upwards from below. The balls rebound with the same speed with which they strike the plate. Find the velocity with which the balls strike the plate. (Take g=9.8 m/s2)

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