JEE Main 2022 · 25 Jun · Shift 2 · Physics Q52

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PhysicsInteger+4 / -1Question 52 of 90

A curved in a level road has a radius 75 m. The maximum speed of a car turning this curved road can be 30 m/s without skidding. If radius of curved road is changed to 48 m and the coefficient of friction between the tyres and the road remains same, then maximum allowed speed would be ______ m/s.

Your answer

Answer and worked solution

Official answer: 24

Maximum speed $v=\sqrt{\mu rg}\propto\sqrt r$ .

New speed. $30\sqrt{\dfrac{48}{75}}=30\times0.8=24$ m/s.

Answer: 24

Topics:Circular motion dynamics Friction

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JEE Main 2022 · 25 Jun · Shift 2, Physics question 52