A metal plate weighing 200 g is balanced in mid air by

Last updated: 6/20/2023

A metal plate weighing 200 g is balanced in mid air by throwing 40 balls per second vertically upwards from below After collision balls rebound with the same speed What is the speed with which the balls strike the plate Given mass of each ball 200 g 1 5 7 cm s 2 12 25 cm s 3 9 8 cm s 4 14 cm s o force of