NEET 2026 Physics question
A car travels on a circular racetrack of radius 50 m, which is banked at an angle . If the car travels at a speed , then the wear and tear on its tyres is minimum. Taking the acceleration due to gravity to be , the value of is:
Answer: (1)
Solution
Wear and tear is minimum when no friction is needed between tyres and road, i.e. the car moves at the optimum (design) speed for which the horizontal component of the normal force alone supplies the centripetal force:
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