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KVPY2012PhysicsMotion in Two Dimensions

A girl holds a book of mass m against a vertical wall with a horizontal force F using heer fingér so that the book does not move. The frictional force on the book by the wall is -

Options

  1. AF and along the finger but pointing towards the girl
  2. BF upwards where is the coefficient of static friction
  3. Cmg and upwards
  4. DEqual and opposite to the resultant of F and mg

Correct answer

C. mg and upwards

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