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General
Easy
Question
A block placed on a rough inclined plane of inclination 
can just be pushed upwards by applying a force "F" as shown. If the angle of inclination of the inclined plane is increased to 
, the same block can just be prevented from sliding down by application of a force of same magnitude. The coefficient of friction between the block and the inclined plane is
- None of these
The correct answer is:
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In the shown arrangement if 
and T be the frictional forces on 2 kg block, 3 kg block & tension in the string respectively, then their values are: 
In the shown arrangement if and T be the frictional forces on 2 kg block, 3 kg block & tension in the string respectively, then their values are:
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A wedge of mass M is pushed with a speed 
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. The angle of inclination 
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A wedge of mass M is pushed with a speed on a rough horizontal plane. The angle of friction between the wedge and horizontal plane is . The angle of inclination of the pendulum is
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A block is placed on a rough horizontal surface. The minimum force required to slide the block is :
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A block of mass m is pressed against a vertical wall with a horizontal force F=mg. Another force 
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, the friction between them is :
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A block of mass 
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Figure shows an arrangement of a rod of length l and mass M and a bead of mass m attached to a weightless string passing over a frictionless pulley. At t=0, the bead is in level with the lower end of the rod. The bead slides down the string with considerable friction and is opposite the other end of the rod after 
second. Assuming friction between the bead and the string to be constant all through, the frictional force is
Figure shows an arrangement of a rod of length l and mass M and a bead of mass m attached to a weightless string passing over a frictionless pulley. At t=0, the bead is in level with the lower end of the rod. The bead slides down the string with considerable friction and is opposite the other end of the rod after second. Assuming friction between the bead and the string to be constant all through, the frictional force is
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A block A of mass 3 kg and another block B of mass 2 kg are connected by a light inextensible string as shown in figure. If the coefficient of friction between the surface of the table and A is 0.5. What maximum mass C is to be placed on A so that the system is to be in equilibrium?
A block A of mass 3 kg and another block B of mass 2 kg are connected by a light inextensible string as shown in figure. If the coefficient of friction between the surface of the table and A is 0.5. What maximum mass C is to be placed on A so that the system is to be in equilibrium?
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In this figure how much force on mass m=5 kg should be applied, so that it just won't slip. Given that car is moving with constant acceleration 
:
In this figure how much force on mass m=5 kg should be applied, so that it just won't slip. Given that car is moving with constant acceleration :
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A 4 kg block A is placed at the top of 8 kg block B which rests on a smooth table. A just slips on B when a force of 20 N is applied on A. The maximum horizontal force F required to make both 
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A 40 kg slab rests on a frictionless floor. A 10 kg block rests on top of the slab. The coefficient kinetic friction between the block and the slab is 0.40. A horizontal force of 100 N is applied on the 10 kg block. Find the resulting acceleration of the slab. 
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A block of mass m, lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q, inclined at an angle to vertical. The block will remain in equilibrium, if coefficient of friction between it and surface is
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Block A of mass m rests on the plank B of mass 3m which is free to slide on a frictionless horizontal surface. The coefficient of friction between the block and plank is 0.2. If a horizontal force of magnitude 2mg is applied to the plank B, the acceleration of A relative to the plank and relative to the ground respectively, are:
Block A of mass m rests on the plank B of mass 3m which is free to slide on a frictionless horizontal surface. The coefficient of friction between the block and plank is 0.2. If a horizontal force of magnitude 2mg is applied to the plank B, the acceleration of A relative to the plank and relative to the ground respectively, are:
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A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is
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Block B of mass 100 kg rests on a rough surface of friction coefficient 
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physics-General
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A block of mass 
rests on a rough horizontal surface as shown in the figure. Coefficient of friction between the block and the surface is 
. A force F=mg acting at angle with the vertical side of the block pulls it. In which of the following cases can the block be pulled along the surface ?
A block of mass rests on a rough horizontal surface as shown in the figure. Coefficient of friction between the block and the surface is . A force F=mg acting at angle with the vertical side of the block pulls it. In which of the following cases can the block be pulled along the surface ?
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