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KVPY2013PhysicsRotational Motion

A wheel of radius R with an axle of radius R / 2 is shown in the figure and is free to rotate about a frictionless axis through its centre and perpendicular to the page. Three forces (F, F, 2 F) are exerted tangentially to the repective rims as shown in the figure. The magnitude of the net torque acting on the system is nearly

Options

  1. A3.5 FR
  2. B3.2 FR
  3. C2.5 FR
  4. D1.5 FR

Correct answer

A. 3.5 FR

Step-by-step solution

_ Net =F ( R 2 )+F R+2 F R=3.5 FR

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