A person on a skateboard throws a 1.8 kg medicine ball horizontally with a velocity of 6.5 m/s.
State the equation linking momentum, mass, and velocity.
Calculate the initial momentum of the medicine ball.
When the person throws the medicine ball forwards, they roll backwards on the skateboard. Explain why they move in this direction.
The person wears soft elbow pads that compress easily. Explain how the pads protect their elbows if they fall on the ground.