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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Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?
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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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