Question

A surface is hit elastically and normally by n balls per unit time, all the balls having the same mass m and moving with the same velocity u .The force on the surface is:

Moderate

Solution

Force on the surface = Magnitude of rate of change of momentum of the balls = n $[m u - (- m u)} = 2 n m u$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

SCAN ME