A 4.0-kg ball has a momentum of 20.0 kg m/s. What is the ball's speed?
As we know, momentum= mass*velocity mass = 4 kg momentum= 20 kg-m/s momentum = mass*velocity (speed) velocity (speed) = momentum/mass velocity(speed)=20/4 = 5 m/s
The correct answer is B 5.0 m/s