Work, Power and EnergyHard
Question
A car is moving along a hilly road as shown (side view). The coefficient friction between the types and pavement is constant and the car maintains steady speed. If at one of the points shown the driver applies the brakes as hard as possible without making the types slip, the magnitude of the friction force immediately after the brakes applied will be maximum if the car was at
Options
A.point A
B.point B
C.point C
D.friction force position A, B and C
Solution
At A & B, N = mg - mv2/R & at C, N = mg + mv2 /R ∴ fmax μsN → maximum for C
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