equilibrium problem and newton first law questions with solutions

Showing 1–10 of 43 questions

• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  When a running train stops suddenly, passengers tend to fall forward because:

  Options

  • Option A

    The back of the seat pushes them forward

  • Option B

    Inertia of rest takes the body forward

  • Option C

    The upper part of the body tends to continue in motion while the lower part comes to rest with the train

  • Option D

    Nothing can be concluded

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  A block of mass M rests on a fixed smooth inclined plane of angle θ. The magnitude of force exerted by the plane on the block is:

  Options

  • Option A

    Mg

  • Option B

    Mg/cosθ

  • Option C

    Mg cosθ

  • Option D

    Mg tanθ

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• MCQeasyNewtons law of motion and Frictionequilibrium problem and newton first law

  Three blocks of masses m, 2m and 3m hang vertically from connected strings. An upward force F moves all three blocks upward with constant speed. Find the net force on the 2m block.

  

  Options

  • Option A

    zero

  • Option B

    2mg

  • Option C

    3mg

  • Option D

    6mg

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  Two masses m and M are held in equilibrium by strings as shown. The relation for angle θ is:

  

  Options

  • Option A

    tanθ=1+2M/m

  • Option B

    tanθ=1+2m/M

  • Option C

    tanθ=1+M/(2m)

  • Option D

    tanθ=1+m/(2M)

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  A body of mass 1 kg is suspended by two strings as shown in the original figure. The left and right strings make angles 60° and 30° with the horizontal respectively. If g = 10 m/s², the magnitudes of tensions T₁ and T₂ respectively are:

  

  Options

  • Option A

    5√3 N, 5 N

  • Option B

    5 N, 5√3 N

  • Option C

    5 N, 5 N

  • Option D

    5√3 N, 5√3 N

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  A particle with velocity v is acted on by three forces represented successively by the sides of the closed vector triangle PQR shown. The velocity will:

  

  Options

  • Option A

    decrease

  • Option B

    remain constant

  • Option C

    change according to the smallest force QR

  • Option D

    increase

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  Which option represents the correct free-body diagram of a rod of mass m supported by a vertical string and a smooth horizontal floor as shown?

  

  Options

  • Option A

    

  • Option B

    

  • Option C

    

  • Option D

    None of these

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  Forces of 30 N, 40 N and 50 N act along sides AB, BC and CA of an equilateral triangle ABC. The 5 kg triangle is kept in a vertical plane. The vertical force on the triangle is:

  

  Options

  • Option A

    125 N upward

  • Option B

    5 N downward

  • Option C

    10 N upward

  • Option D

    10 N downward

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• IntegerdifficultNewtons law of motion and Frictionequilibrium problem and newton first law

  In the ideal-pulley system shown, mass Mᵦ=10 kg. Find Mₐ in kg so that block A remains in equilibrium.

  

  Your answer

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• MCQmediumNewtons law of motion and Frictionequilibrium problem and newton first law

  Blocks A and C of mass m and block B of mass M hang in the symmetric string system shown. For equilibrium:

  

  Options

  • Option A

    M=2m

  • Option B

    M<2m

  • Option C

    M>2m

  • Option D

    M=m

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