5. A 70.0 kg football player is gliding across very smooth ice at 2.00 m/s. He throws a 0.450 kg football straight forward. What is the player's speed afterward if the ball is
thrown at
a. 15.0 m/s relative to the ground?
b. 15.0 m/s relative to the player?

the answer is a. the yacht traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

im doing peak rn so sry if its wrong

c) up is the direction the magnetic force is acting on the charge.

that would be because of both gravity and friction. so     c