Problem 14Q

Problem

V\fe claim that momentum and angular momentum are conserved. Yet most moving or rotating objects eventually slow down and stop. Explain.

Step-by-step solution

Step 1 of 1

The momentum and angular momentum are conserved when the total or net external force and net external torque acting on the body are zero respectively.

But, the moving or rotating bodies eventually slow down and stop since the frictional forces are always present, which actually exert a net torque on the system. But in an ideal situation (in field free deep space), where the net force and torque are zero, the momentum and angular momentum are indeed conserved.

Therefore, the moving or rotating bodies eventually slow down and come to rest.