Question

6. A baseball of mass 0.145 kg is moving in the +y-direction with a speed
of 1.30 m/s, and a tennis ball of mass 0.0570 kg is moving in the –

Answer 1

The momentum of the baseball:

$$p=mv=0.145·1.3=0.189\text{ kg m/s}.$$

The momentum of the tennis ball moving at 2 m/s in -x direction:

$$p=mv=0.057·(-2)=-0.114\text{ kg m/s}.$$