A roller coaster is pulled up a hill by a chain attached to a motor. The total roller coaster’s mass is 5,000 kg. If it takes 20 seconds to pull the roller coaster up a 50-meter hill, how powerful is the motor? *
A. 49,000 N
B. 2,450,000 Nm.
C. 122, 500 Watts
D. None of the above
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Explanation:
i think its B...........
.............
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