A ball of mass m falls vertically from a height h and collides with a block of equal mass m moving horizontally with a velecity upsilon on a surface. The coefficient of kinetic friction between the block and the surface is 0.2, while the coefficient of restitution e between the ball and the block is 0.5. There is no friction acting between the ball and the block. The velocity of the blockdecreases by :

A ball of mass m falls vertically from a height h and collides with a

1.	A ball of mass m falls vertically from a height h and collides with a block of equal mass m moving horizontally with a velecity upsilon on a surface. The coefficient of kinetic friction between the block and the surface is 0.2, while the coefficient of restitution e between the ball and the block is 0.5. There is no friction acting between the ball and the block. The velocity of the blockdecreases by :
Answer» 0 `0.1sqrt(2gh)` `0.3 SQRT(2gh)` can't be said Answer :D