MHT CET 2025 Physics question
A motor cyclist has to rotate in horizontal circles inside the cylindrical wall of inner radius 'R' metre. If the coefficient of friction between the wall and the tyres is '', then the minimum speed required is (g = acceleration due to gravity)
Answer: (B)
Solution
On the vertical wall the normal reaction N provides the centripetal force: . The friction force (vertical, upward) must balance the weight: . For the minimum speed $μ_sN = mg
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