Please help: In the figure below, a stuntman drives a car at constant speed (and

Question

Please help:

In the figure below, a stuntman drives a car at constant speed (and without negative lift) over the top of a hill and then into a valley. Both the top of the hill and the bottom of the valley can be approximated by circles of radius R = 220 m. The driver's mass is 61.0 kg. What is the greatest speed at which the stuntman can drive without the car leaving the road at the top of the hill? If the driver is driving at the maximum speed you found in part (a), what is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley?

Explanation / Answer

1)mg=mv^2/r

for limiting case

v=sqrt(rg)=46.432m/sec

2)n-mg=mv^2/r

n=2mg=1195.6N

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