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A roller-coaster vehicle has a mass of 490 kg when fully loaded with passengers (see figure).
B)
15 mi
10 m
A
(a) If the vehicle has a speed of 21.0 m/s at point A, what is the force of the track on the vehicle at this point?
(b) What is the maximum speed the vehicle can have at point B in order for gravity to hold it on the track?
m/s
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