The limiting friction between two bodies in contact is independent of

  • A

    Nature of the surface in contact

  • B

    The area of surfaces in contact

  • C

    Normal reaction between the surfaces

  • D

    The materials of the bodies

Similar Questions

A block of mass $m$ is moving with a constant acceleration a on a rough plane. If the coefficient of friction between the block and ground is $\mu $, the power delivered by the external agent after a time $t$ from the beginning is equal to

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  • [KVPY 2017]

A rectangular box lies on a rough inclined surface. The coefficient of friction between the surface and the box is $\mu $. Let the mass of the box be $m$.

$(a)$ At what angle of inclination $\theta $ of the plane to the horizontal will the box just start to slide down the plane ?

$(b)$ What is the force acting on the box down the plane, if the angle of inclination of the plane is increased to $\alpha > \theta $ ?

$(c)$ What is the force needed to be applied upwards along the plane to make the box either remain stationary or just move up with uniform speed ?

$d)$ What is the force needed to be applied upwards along the plane to make the box move up the plane with acceleration $a$ ?

A boy of mass $4\, kg$ is standing on a piece of wood having mass $5 \,kg$. If the coefficient of friction between the wood and the floor is $0.5,$ the maximum force that the boy can exert on the rope so that the piece of wood does not move from its place is ......$N.$(Round off to the Nearest Integer) [Take $g=10 \,ms ^{-2}$ ]

  • [JEE MAIN 2021]

In the figure, a block of weight $60\, N$ is placed on a rough surface. The coefficient of friction between the block and the surfaces is $0.5$. ........ $N$ should be the maximum weight $W$ such that the block does not slip on the surface .