How hard does the track push on the car at the top of loop

Reference no: EM13531521

A car of mass m is on a frictionless roller coaster track. The car starts at a height h and then travels down its first hill all the way to ground level where it enters a loop of radius r. How hard does the track push on the car at the top of the loop? What is the minimum height of the starting point if the car is to make it all the way around the loop?

Reference no: EM13531521

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