3. A roller-coaster car is moving over the top of a hill. At the instant it is on the hill top, it has a kinetic energy of E and a gravitational potential
energy of 3E. When it coasts down to ground level, if total mechanical energy is conserved, what is the kinetic energy of the car on the ground?
(A) 4E (B) 3E (C) 2E (D) E
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Often called simply "velocity," this is the velocity of an object at a particular moment in time.
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The amount of potential energy possessed by an elevated object is equal to what?
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3. A roller-coaster car is moving over the top of a hill. At the instant it is on the hill top, it h...
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