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A 2125kg car is sitting at an observation point 450m above the valley below. What is the car's potential energy?

a. If the car is pushed off the edge, what is its kinetic energy after two seconds of free fall? (Remember, velocity during free fall = g*t)
B.What percentage of the car's mechanical energy is converted to mechanical energy after those two seconds?
C.What is the car's potential energy when it hits the ground?