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 the speed 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
Solving the equation for v, the speed, we find:
[tex]v=\frac{p}{m}=\frac{12 kg m/s}{4 kg}=3 m/s[/tex]
