JEE Main Physics question
A motor car has a width 1.1 m between wheels. Its centre of gravity is 0.62 m above the ground and the coefficient of friction between the wheels and the road is 0.8. What is the maximum possible speed, if the centre of gravity inscribes a circle of radius 15 m? (Road surface is horizontal)
Answer: (C)
Solution
The maximum speed is limited by whichever condition (skidding or toppling) is reached first. Skidding speed: v = √(μRg) = √(0.8×15×9.8) ≈ √117.6 ≈ 10.84 m/s.
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