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A roller coaster is pulled up a hill by a chain attached to a motor . The roller coaster has total mass of 15,000kg.If it takes 30 seconds to pull the roller coaster up a 40 meter Hill. how powerful is the motor?


Sagot :

Answer:

The free-body diagram (part a) is shown at the right.

The acceleration of the car can be computed as follows:

a = v2/R = (18.0 m/s)2/(12.0 m) = 27.0 m/s2 (part b)

The net force can be found in the usual manner:

Fnet = m•a = (500. kg)•(27.0 m/s2) = 13500 N (part b)