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## Homework Statement

An automobile moves at constant speed over a hill with a radius of 18 m. At the top of the hill, the drivers notices that she barely remains in contact with the seat. find the speed of the vehicle.

## Homework Equations

Using Newton's second lay, and centripetal force formula

## The Attempt at a Solution

N=0

W-N = Fc <centripetal force>

therefoce, (mv^2)/r = mg

and v= (rg)^0.5

I do not have the answer, so wondering if I have made any mistake somewhere above ?