Answer:
A) 3 m/s
Explanation:
The magnitude of the momentum of an object is given by:
[tex]p=mv[/tex]
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:
[tex]v=\frac{p}{m}=\frac{12 kg m/s}{4 kg}=3 m/s[/tex]
