A steel ball is luanched on a table to be 4.0 m/s. If the tabletop is 1.5m tall then where should you place a 20cm tall can to catch the ball where it lands?

Answer 1

Calculate what the x coordinate of the ball would be when it has fallen y = 1.3 m. The ball takes
t = sqrt(2y/g) =0.515 s to get there. It moves 4.0*0.515 = 2.06 m from the table edge in that time.