Aball is projected horizontally from a table 1.0 m high and hits the ground after falling from a time t=0.45s. if the ball travels horizontally a distance x = 3.0 m in that time it’s initial velocity was equal to

A12-g wad of sticky clay is hurled horizontally at a 100-g wooden block initially at rest on a horizontal surface. the clay sticks to the block. after impact, the block slides 7.5 m before coming to rest. if the coefficient of friction between the block and the surface is 0.65, what was the speed of the clay immediately before the impact?