Question

The speed of a 4-kg ball with a momentum of 12 kg m/s is

Answer 1

Answer:

3 m/s

Explanation:

The momentum of an obejct is given by

$p=mv$

where

m is the mass of the object

v is the velocity of the object

For the ball in this problem, we know:

$p = 12 kg m/s$ is the momentum

$m=4 kg$ is the mass

Therefore, we can re-arrange the equation to find v, the velocity of the ball:

$v=\frac{p}{m}=\frac{12 kg m/s}{4 kg}=3 m/s$