(Answered) An initially motionless car of mass 1000 kg slides down

Statistics

An initially motionless car of mass 1000 kg slides down from a height 40 m on a frictionless roller coaster track. It enters a circular vertical loop-the-loop of radius 10 m. What acceleration does a passenger feel at the bottom of the loop just as the curvature starts?

a) 5g

b) 7g

c) 9g

d) 11g

e) 13g

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