In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ground?
1.2 joules
4.9 joules
2.0 joules
6.8 joules
2 answers
4.9
4.9j