Question

A beach ball is rolling in a straight line toward you at a speed of 9 m/sec. it's momentum is 3 kg.m/sec. what is the mass of the beach ball?

Answer 1

Answer:

1/3 kg

Explanation:

Concepts

The formula p = mv tells us that momentum is mass times velocity. We can easily rearrange this equation to solve for m by dividing both sides by v:

• p/v = mv/v
• m = p/v

Application

We are asked to find the mass of a beach ball, given the velocity as 9 m/s and the momentum as 3 kg · m/s. We can use the formula m = v/p to find the mass of the ball in kilograms.

Solution

• $m = \frac{3}{9}$
• $m = 1/3$