Newton's Law of Motion & Equilibrium questions with solutions

Showing 1–10 of 43 questions

• MCQmediumNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  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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• MCQmediumNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  A 50 kg smooth sphere rests on a 30° smooth incline A and against a smooth vertical wall B. The contact forces are:

  

  Options

  • Option A

    Nᵦ=1000/√3 N, Nₐ=500/√3 N

  • Option B

    Nₐ=1000/√3 N, Nᵦ=500/√3 N

  • Option C

    Nₐ=100/√3 N, Nᵦ=500/√3 N

  • Option D

    Nₐ=1000/√3 N, Nᵦ=50/√3 N

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• MCQmediumNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  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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• Multi-correctdifficultNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  Two particles of masses 10 kg and 35 kg are connected by four string segments as shown and remain in equilibrium. Take g=10 m s⁻². Which tension values are correct?

  

  Select all that apply

  • Option A

    T₁=150√2 N

  • Option B

    T₂=250 N

  • Option C

    T₃=200√3 N

  • Option D

    T₄=50(3+2√3) N

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• MCQmediumNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  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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• IntegerdifficultNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  A 2 kg mass M hangs at junction C supported by strings AC and BC making 30° and 60° with the horizontal. Find tension in string AC in newtons.

  

  Your answer

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• MCQeasyNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  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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• MCQeasyNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  Three forces F₁ = 10 N, F₂ = 8 N and F₃ = 6 N act on a 5 kg particle. F₂ and F₃ are perpendicular and the particle is initially at rest under all three forces. If F₁ is removed, the acceleration is:

  Options

  • Option A

    2 m s⁻²

  • Option B

    0.5 m s⁻²

  • Option C

    4.8 m s⁻²

  • Option D

    7 m s⁻²

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• MCQeasyNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  Physical independence of force is a consequence of:

  Options

  • Option A

    third law of motion

  • Option B

    second law of motion

  • Option C

    first law of motion

  • Option D

    all of the above laws

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• MCQmediumNewtons law of motion and FrictionNewton's Law of Motion & Equilibrium

  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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