Question

A ball is moving at 4 m/s and has momentum 48 kg.m/s. What is the ball's mass (in kilograms)?

Answer 1

Given:

The speed of the ball is v = 4 m/s

The momentum of the ball is p = 48 kg m/s

Required: The mass of the ball

Explanation:

The mass of the ball can be calculated as

$\begin{gathered} p=mv \\ m=\frac{p}{v} \\ m=\frac{48\text{ kg m/s}}{4\text{ m/s}} \\ =12\text{ kg} \end{gathered}$

Final Answer: The mass of the ball is 12 kg.