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Yognarayan posted an Question
June 30, 2020 • 22:49 pm 30 points
  • IIT JAM
  • Physics (PH)

3. a body of mass m is kept on a rough horizontal surface (friction coetficient= . a person is trying to pull the body by applying a horizontal force but the bo

3. A body of mass M is kept on a rough horizontal surface (friction coetficient= . A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on A is F, where (a) F= MMg (b) F= Mg (d) Mg2F2 Mg Vi -H. (c) Mg sFs Mg V1 +p

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    Ruby negi best-answer

    so when applied force is zero, Friction force is also zero and contact force is mg and when applied force applied , friction force also start acting on it and the contact force becomes mg(1+square of mu)^1/2... so the contact force lie between these two values.. hope u get now... Option c is correct

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    Ruby negi

    sorry dear , I read question little wrong . here the question the force by surface that is contact force..

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    Ruby negi Best Answer

    option b is correct.. because Friction force is in opposite direction of applied force and they are equal that's why object is not moving..when applied force is greater than Friction force then object start moving.

    eduncle-logo-app

    i also thought the same... but according to HCV the answer is C..

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