Physics-
General
Easy
Question
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 the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is :
The correct answer is:
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A block of mass 1 kg slides down on a rough inclined plane of inclination 60
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A block of mass 1 kg slides down on a rough inclined plane of inclination 60 starting from its top. If the coefficient of kinetic friction is 0.5 and length of the plane is 1 m, then work done against friction is (Take g = 9.8 m/s2) :
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A block of mass M = 5kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force F = 40 N is applied, the acceleration of the block will be (g = 10 m/s2) :
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On the horizontal surface of a truck (
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Two carts of masses 200 kg and 300 kg on horizontal rails are pushed apart. Suppose the coefficient of friction between the carts and the rails are same. If the 200 kg cart travels a distance of 36 m and stops, then the distance travelled by the cart weighing 300 kg is :
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A block of mass 5 kg is on a rough horizontal surface and is at rest. Now a force of 24 N is imparted to it with negligible impulse. If the coefficient of kinetic friction is 0.4 and g = 9.8 m/s2 , then the acceleration of the block is :
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If mass of A = 10 kg, coefficient of static friction = 0.2, coefficient of kinetic friction = 0.2. Then mass of B to start motion is :
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The coefficient of static friction, µs , between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s2)
The coefficient of static friction, µs , between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s2)
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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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A block of mass 2 kg is kept on the floor. The coefficient of static friction is 0.4. If a force F of 2.5 Newtons is applied on the block as shown in the figure, the frictional force between the block and the floor will be :
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A block A with mass 100 kg is resting on another block B of mass 200 kg. As shown in figure a horizontal rope tied to a wall holds it. The coefficient of friction between A and B is 0.2 while coefficient of friction between B and the ground is 0.3. The minimum required force F to start moving B will be :
A block A with mass 100 kg is resting on another block B of mass 200 kg. As shown in figure a horizontal rope tied to a wall holds it. The coefficient of friction between A and B is 0.2 while coefficient of friction between B and the ground is 0.3. The minimum required force F to start moving B will be :
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The blocks A and B are arranged as shown in the figure. The pulley is frictionless. The mass of A is 10kg. The coefficient of friction of A with the horizontal surface is 0.20. The minimum mass of B to start the motion will be :
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Which is a suitable method to decrease friction :
Which is a suitable method to decrease friction :
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Two masses A and B of 10 kg and 5 kg respectively are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown. The coefficient of static friction of A with table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is :
Two masses A and B of 10 kg and 5 kg respectively are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown. The coefficient of static friction of A with table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is :
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In the figure shown, a block of weight 10 N resting on a horizontal surface. The coefficient of static friction between the block and the surface µs = 0.4. A force of 3.5 N will keep the block in uniform motion, once it has been set in motion. A horizontal force of 3 N is applied to the block, then the block will :
In the figure shown, a block of weight 10 N resting on a horizontal surface. The coefficient of static friction between the block and the surface µs = 0.4. A force of 3.5 N will keep the block in uniform motion, once it has been set in motion. A horizontal force of 3 N is applied to the block, then the block will :
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