Question : A platform scale is calibrated to indicate the mass in kilograms of an object placed on it… ?
Particles fall from a height of 4.5 m and collide with the platform of the scale. The collisions are elastic; the particles rebound upward with the same speed they had before hitting the pan. If each particle has a mass of 120 g and collisions occur at the rate of 38 s-1, what is the average scale reading in kg?
platform scales

Best answer:

Answer by Steve
F = ∆P*38 = 2*m*V*38 = 2*m*√(2gy)*38 = 2*.120*√(2*9.8*4.5)*38 = 85.65 N = 8.74 kg