1. The problem statement, all variables and given/known data A stream of elastic glass beads, each with a mass of 0.46 g, comes out of a horizontal tube at a rate of 108 per second. The beads fall a distance of 0.54 m to a balance pan and bounce back to their original height. How much mass must be placed in the other pan of the balance to keep the pointer at zero? 2. Relevant equations 1/2mv^2 3. The attempt at a solution What I attempted was solving for the velocity of the ball as it hits the pan, then I multiplied by the mass, but Im not sure of how to account the rate.