Please answer both as I am studying for finals and will give an upvote if both are answered.
A rock resting at the edge of a cliff is dropped over the edge. Ignoring friction, which of the following statements is false?
The potential energy increases as the kinetic energy decreases.
The potential energy decreases at the same rate as the kinetic energy increases.
The potential energy of the rock (relative to the ground) at the top is greater than the kinetic energy at the top.
The mechanical energy of the rock at the top is equal to the mechanical energy at the bottom.
A baseball has a mass of 0.400 kg and a gravitational potential energy of 235 J. When the baseball falls back to the ground at what speed does it hit the ground?
17.1 m/s
34.3 m/s
13.7 m/s
24.2 m/s
