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60. A roller coaster has mass of 500 kg ..-阿摩線上測驗
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60. A roller coaster has mass of 500 kg when fully loaded
with passengers shown in the figure on the right. When
the coaster passes through the bottom of a circular dip
with a radius of 40 m (as shown in the figure) at a
speed of 16.0 m/s. What is the magnitude of the force
of the track on the coaster at the bottom of the dip?
(A) 0
(B) 1700N
(C) 3200N
(D) 4900N
(E) 8100N