Question

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

Answer 1

3 m/s

Step-by-step 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=(p)/(m)=(12 kg m/s)/(4 kg)=3 m/s`