2.) For two-dimensional motion, what formula equates potential and kinetic energy? Define all variables in the equation, and explain how this equation describes the Law of Conservation of Energy? (40 points)

3.) If a boulder is pushed off a cliff, at what point of its motion will the potential energy of the boulder be at its maximum and minimum values? Explain your answer. (20 points)

4.) When will the kinetic energy of the boulder be at its maximum and minimum values? (20 points)