APFIVE Frictional Force on a Banked Turn
A test track has a banked circular turn with radius 80 m and banking angle 25°. If a car travels at exactly the speed where no friction is needed, what happens to the required coefficient of friction if the car’s speed is reduced by 10%?
A
No friction is still required
B
Friction must act down the bank
C
The car will skid regardless of friction
D
Friction must act up the bank
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