Here is the question:
"A ball moves through the air, and experiences a force of air resistance, in addition to the force of gravity. While it moves, its total mechanical energy decreases by 15J, and its gravitational potential evergy decreases by 25J"
A: What is the net work done on this ball by all the forces acting on it?
B: What is the work done on the ball by the force of air resistance.
C: What is the work done on the ball by the force of Gravity?
The Attempt at a Solution
I'm not sure which formulas to use here... Can anyone help me out?