Four sleds are pulled up the hill. The table below shows the weight of each sled and it’s charge in height after being pulled up the hill. Which pair of sleds have the same change in potential energy ? PE=mgh and Fg (weight) =mg

Several students in the group made comments to the coach about the back pack. which student has the correct analysis of the forces and motion of the back pack?

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

Could someone me find the answer to this problem.