Question

An 8 kilogram bowling ball is rolling in a straight line toward you. If its momentum is 16 kg•m/sec, how fast it is traveling.

Answer 1

By the definition of momentum, we have:

$$p=mv,$$ $$v=\dfrac{p}{m}=\dfrac{16\ \dfrac{kgm}{s}}{8\ kg}=2\ \dfrac{m}{s}.$$

Answer:

$v=2\ \dfrac{m}{s}.$