Maximum Push Using Friction
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Q. A block of mass 1 kg is placed on a rough horizontal surface connected by a light string passing over two smooth pulleys as shown. Another block of 1 kg is connected to the other end of the string. The acceleration of the system is (coefficient of friction for rough horizontal surface is μ=0.2)


- 0.8 g
- Zero
- 0.4 g
- 0.5 g
Q. A block of mass 1 kg is kept on a rough inclined plane of angle 30o. Find the frictional force acting on the block. Given coefficient of friction μ=0.8
- 6.7 N
- 4.9 N
- 10 N
- Zero
Q. A block placed on a horizontal surface is being pushed by a force F making an angle θ with the vertical as shown in figure. The coefficient of friction between block and surface is μ. The force required to slide the block with uniform velocity on the floor is


- μmg(sinθ−μcosθ)
- (sinθ−μcosθ)μmg
- μmg
- None of these
Q. In the figure shown find the acceleration of 2 kg body and also take μs=0.5, μk=0.4[Take g=10 m/s2]


- 1.5 m/s2
- 1 m/s2
- 0.5 m/s2
- 0 m/s2
Q. Find the acceleration (in m/s2) of the body of mass 20 kg shown in the figure. Take g=10 m/s2.


- 0.33
- 6.4
- Zero
- 10
Q. In the figure shown, what is the value of mass ‘m’ such that block A slides up with a constant velocity. Take g=10 m/s2, Coefficient of friction between inclined plane and block A is 0.5.


- 1 kg
- 2 kg
- 3 kg
- 4 kg
Q. In the figure shown, if the block does not slide down the plane when a force of 10 N is applied perpendicular to the plane, find the coefficient of static friction between the plane and the block.(Consider limiting case of friction) Take g=10 m/s2.


- 1√2
- 12
- 13
- 1√3
Q. The coefficient of static friction is 0.2 between block A of mass 2 kg and the table as shown in the figure. 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)


- 2.0 kg
- 4.0 kg
- 0.2 kg
- 0.4 kg
Q. A man of mass 60 kg is pulling a mass M by an inextensible light rope passing through a smooth and massless pulley as shown. μ between the ground and the man is 0.5. Find the maximum value of M that can be pulled slowly by the man without slipping on the ground.


- 2402+√3 kg
- 1201+√3 kg
- 1202+√3 kg
- 1204+√3 kg
Q. A block rests on a rough inclined plane making an angle of 30∘ with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block (in kg) is (take g=10 m/s2)
- 2.5 kg
- 1.6 kg
- 2 kg
- 4 kg