The diagrams below show a man swinging a golf club. The kinetic energy of the golf club at point Y is more than the potential energy of the club at point X. Which of the following statements best explains why this fact does not violate the law of conservation of energy?
Energy is added by the man to the golf club from point X to point Y
Gravity is constant from point X to point Y
Air resistance is greater at point than at point X
Acceleration due to gravity is greater at point than at point X