Challenging Physics Problem involving RC Cars.

Gl4di4tor

Senior member
Jun 8, 2001
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A Small remote control car with a mass of 1.20 kg moves at a constant speed of v= 12.0 m/s in a vertical circle inside a hollow metal cylinder that has radius of 5.00 m. what is the magnitude of the normal force exerted on the car by walls of the cylinder at (a)the bottom of the circle? (b) at the top of the circle?
Sec Tutorial: Link


my answer:
Fn=mg+Fc
Fc=(mv^2)/r
mg=11.76 N
Fc=34.56 N
(a)Fn=46.32 N
(b)Fn=0 N