Question

A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed?A) 3 m/sB) 4 m/sC) 12 m/sD) 48 m/sE) none of these

Answer 1

A) 3 m/s

Step-by-step explanation:

The magnitude of the momentum of an object is given by:

`p=mv`

where

m is the mass of the object

v is its speed

In this problem, we have:

m = 4 kg is the mass of the ball

p = 12 kg m/s is its momentum

Solving the equation for v, we can find the speed of the ball:

`v=(p)/(m)=(12 kg m/s)/(4 kg)=3 m/s`