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JEE Main202524 Jan 2025Morning ShiftPhysicsLaws of MotionActual

A car of mass ' m ' moves on a banked road having radius ' r ' and banking angle . To avoid slipping from banked road, the maximum permissible speed of the car is v₀ . The coefficient of friction between the wheels of the car and the banked road is

Options

  1. A= v _ o ^2+ rg rg + v _ o ^2
  2. B= v₀^2-r g r g-v₀^2
  3. C= v₀^2-r g r g+v₀^2
  4. D= v_o^2+r g rg - v _ o ^2

Correct answer

C. = v₀^2-r g r g+v₀^2

Step-by-step solution

So, N=m g + m v₀^2 r _r= m g + m v₀^2 r aligned & And m v₀^2 r =m g +f_r & m v₀^2 r -m g = (m g + m v₀^2 r ) & (v₀^2-g r )= (v₀^2 +g r ) & = v₀^2-g r g r+v₀^2 aligned

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