Problems on Friction

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Friction - Problems L1

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Friction - Problems L2

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Important Questions

A block of mass rests on a horizontal table. A light string connected to it passes over a frictionless pulley at the edge of table and from its other end another block  of mass is suspended. The coefficient of kinetic friction between the block and the table is . When the block  is sliding on the table, the tension in the string is:

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What is the acceleration of the block and trolley system shown in fig. if the coefficient of kinetic friction between the trolley and the surface is ? What is the tension in the string?
(Take . Neglect the mass of the string.

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A given object takes times as much time to slide down at rough incline as it takes to slide down a perfectly smooth incline. The coefficient of kinetic friction between the object and the incline is given by :

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A heavy uniform chain lies on a horizontal table top. If the coefficient of friction between the chain and the table surface is , then find the maximum of the length of the chain that can hang over one edge of the table.

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A system consists of three identical masses and connected by a string passing over a pulley P. The mass hangs freely and and are on a rough horizontal table (the coefficient of friction). The pulley is frictionless and of negligible mass. The downward acceleration of mass is 

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A block of mass is resting on a rough horizontal surface for which the coefficient of friction is . When a force is applied in horizontal direction, the acceleration of the block will be then .

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A block of mass 10 kg placed on rough horizontal surface having coefficient of friction = 0.5, if a horizontal force of 100 N acting on it then acceleration of the block will be : -

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A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches , the box starts to slip and slides down the plank in . The coefficients of static and kinetic friction between the box and the plank will be, respectively 

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A  block of mass is held against a wall applying a horizontal force of on the block. If the coefficient of friction between the block and the wall is . the magnitude of the friction force acting on the block is

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A conveyor belt is moving at a constant speed of , a box is gently dropped on it. The coefficient of friction between them is . The distance that the box will move relative to belt before coming to rest on it (taking ), is:

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