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A force F=i^+4j^ acts on the block shown. The force of friction acting on the block is

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Important Questions on Laws of Motion

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Two blocks of mass M and m are kept on the trolley whose all surfaces are smooth select the correct statement

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Coefficient of friction between A and B is μ. The minimum force F with which A will be pushed such that B will not slip down is

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A block of mass 10 kg is held at rest against a rough vertical wall [μ=0.5] under the action a force F as shown in figure. The minimum value of F required for it is g=10 m s-2

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A block is projected with speed 20 ms-1 on a rough horizontal surface. The coefficient of friction (μ) between the surfaces varies with time (t) as shown in figure. The speed of body at the end of 4 second will be g=10 m s-2

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An object starts from rest and is acted upon by a variable force F as shown in figure. If F0 is the initial value of the force, then the position of the object, where it again comes to rest will be

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The frictional force acting on 1 kg block is

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A block of mass m is at rest on a rough inclined plane of angle of inclination θ. If coefficient of friction between the block and the inclined plane is μ, then the minimum value of force along the plane required to move the block on the plane is (tanθ<μ)
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A block of mass m takes time t to slide down on a smooth inclined plane of angle of inclination θ and height h. If same block slides down on a rough inclined plane of same angle of inclination and same height and takes time n times of initial value, then coefficient friction between block and inclined plane is