two and more than two block problem in friction questions with solutions

Showing 1–10 of 38 questions

• ParagraphmediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  A 10 kg block is placed on a 5 kg block. The coefficient of friction between the two blocks is 0.1 and that between the 5 kg block and the ground is 0.3. A horizontal force F is applied to the 10 kg block as shown. Take g = 10 m s⁻².

  

  Sub-question 1

  The maximum acceleration of the 5 kg block is:

  Options

  • Option A

    1 m s⁻²

  • Option B

    3 m s⁻²

  • Option C

    0

  • Option D

    None

  Sub-question 2

  The acceleration of the 10 kg block when F = 30 N is:

  Options

  • Option A

    2 m s⁻²

  • Option B

    3 m s⁻²

  • Option C

    1 m s⁻²

  • Option D

    None

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• IntegermediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  Blocks A (1 kg) and B (2 kg) are on a frictionless floor with coefficient of friction 0.6 between them. A spring of force constant 900 N m⁻¹ is stretched and the system is released. Find the maximum initial spring extension in cm so that the blocks do not slip relative to each other.

  

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• MCQdifficultNewtons law of motion and Frictiontwo and more than two block problem in friction

  A 4 kg block lies on a rough horizontal table and is connected by a light string over a smooth pulley to a hanging 2 kg block. Coefficient of kinetic friction between 4 kg block and table is 0.25. Take g = 10 m/s². Acceleration of the system is:

  Options

  • Option A

    1 m/s²

  • Option B

    5/3 m/s²

  • Option C

    2 m/s²

  • Option D

    10/3 m/s²

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• IntegermediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  A 4 kg boy stands on a 5 kg wooden block. The coefficient of friction between wood and floor is 0.5. Using the shown pulley-rope arrangement, find the maximum force the boy can exert on the rope without moving the wood. Take g = 10 m s⁻².

  

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• MCQmediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  For the system of blocks and pulley shown, the acceleration of the blocks is a and the friction force acting on the 10 kg block is F. Choose the correct result. Take μ = 0.6 and g = 10 m s⁻².

  

  Options

  • Option A

    F = 60 N, a = 0

  • Option B

    F = 50 N, a = 20/7 m s⁻²

  • Option C

    F = 40 N, a = 0

  • Option D

    F = 40 N, a = 20/7 m s⁻²

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• MCQmediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  In the shown system, the 2 kg block has acceleration 2 m s⁻² to the right. Find the spring extension and the acceleration of the 4 kg block at that instant. Take k = 1000 N m⁻¹, μ values as shown and g = 10 m s⁻².

  

  Options

  • Option A

    0.012 m, 2 m s⁻²

  • Option B

    0.42 m, 1 m s⁻²

  • Option C

    0.012 m, 1 m s⁻²

  • Option D

    0.02 m, 2 m s⁻²

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• MCQdifficultNewtons law of motion and Frictiontwo and more than two block problem in friction

  A block of mass m rests on a plank of mass M. The plank lies on a smooth horizontal floor. Coefficient of static friction between block and plank is μ. A horizontal force F is applied to the plank. The maximum value of F for which the block does not slip is:

  Options

  • Option A

    μmg

  • Option B

    μ(M+m)g

  • Option C

    μMmg/(M+m)

  • Option D

    μMg

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• ParagraphmediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  A 10 kg block is placed on a 5 kg block. The coefficient of friction between the two blocks is 0.1 and that between the 5 kg block and the ground is 0.3. A horizontal force F is applied to the 10 kg block as shown. Take g = 10 m s⁻².

  

  Sub-question 1

  When F = 2 N, the frictional force between the 5 kg block and the ground is:

  Options

  • Option A

    2 N

  • Option B

    0

  • Option C

    8 N

  • Option D

    10 N

  Sub-question 2

  When F = 2 N, the frictional force between the 10 kg block and the 5 kg block is:

  Options

  • Option A

    2 N

  • Option B

    15 N

  • Option C

    10 N

  • Option D

    None

  Sub-question 3

  The maximum value of F that will not cause motion of any block is:

  Options

  • Option A

    10 N

  • Option B

    15 N

  • Option C

    Data insufficient

  • Option D

    None

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• MCQdifficultNewtons law of motion and Frictiontwo and more than two block problem in friction

  A 2 kg block A is placed on a 5 kg block B. The ground is smooth and coefficient of static friction between A and B is 0.4. A horizontal force F is applied on B. Take g = 10 m/s². The maximum value of F for which there is no slipping is:

  Options

  • Option A

    14 N

  • Option B

    20 N

  • Option C

    28 N

  • Option D

    35 N

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• MCQmediumNewtons law of motion and Frictiontwo and more than two block problem in friction

  A ring of mass M and a block of mass m are in equilibrium. The string is light, the pulley is frictionless, and the coefficient of friction between the pole and the ring is μ. The frictional force exerted by the pole on the ring is:

  

  Options

  • Option A

    Mg upward

  • Option B

    μmg upward

  • Option C

    (M-m)g downward

  • Option D

    μmg downward

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