Energy of Motion Unit Test
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Question
A roller-coaster is at the top of a 62-meter hill. The car and its passengers have a total mass of 1,088 kilograms. By the time the car reaches the bottom of the hill, its speed is 74 miles per hour (33 meters per second). How much kinetic energy does the car have at the bottom of the hill?
KE=12mv2
(1 point)
Responses
592,416 J
592,416 J
17,952 J
17,952 J
2,978,944 J
2,978,944 J
1,184,832 J
The correct answer is 1,184,832 J.
KE = 1/2 * 1088 kg * (33 m/s)^2
KE = 1/2 * 1088 * 1089
KE = 1/2 * 1,184,832
KE = 592,416 J