Question

A bowling ball of mass 9.1 kg moves in a
straight line at 4.2 m/s.
How fast must a Ping-Pong ball of mass
3.607 g move in a straight line so that the two
balls have the same momentum?
Answer in units of m/s.
Don't round answer.

Answer 1

We have:

$$p_1=p_2\to m_1v_1=m_2v_2$$

$$(9.1)(4.2)=(0.003607)v_2$$

$$v_2=10600\frac{m}{s}$$