newton second law and problem based on it questions with solutions

Showing 1–10 of 17 questions

• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time t. Which of the following curve best describes acceleration of the block with time:

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  At t = 0, a body of mass 100 g starts from rest under the action of a constant force F = (5î+10ĵ) N. After 2 s, its position vector is r = (2x î+5y ĵ) m. What is the ratio x:y?

  Options

  • Option A

    1:2

  • Option B

    2:5

  • Option C

    5:2

  • Option D

    5:4

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• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  A 500 g body moves along x such that v = 10√x m s⁻¹. The force on the body is:

  Options

  • Option A

    25 N

  • Option B

    5 N

  • Option C

    166 N

  • Option D

    125 N

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• MCQmediumNewtons law of motion and Frictionnewton second law and problem based on it

  A spherical ball of mass 2 kg is released from rest from a height of 10 m above a sand surface. It penetrates 10 cm into the sand and then comes to rest. Taking g = 10 m·s⁻², what is the average resistive force exerted by the sand on the ball during penetration?

  Options

  • Option A

    1980 N

  • Option B

    2020 N

  • Option C

    2000 N

  • Option D

    1000 N

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• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  A wooden block of mass 5kg rests on soft horizontal floor. When an iron cylinder of mass 25 kg is placed on the top of the block, the floor yields and the block and the cylinder together go down with an acceleration of 0.1 m s⁻². The action force of the system on the floor is equal to:

  Options

  • Option A

    297 N

  • Option B

    294 N

  • Option C

    291 N

  • Option D

    196 N

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• MCQmediumNewtons law of motion and Frictionnewton second law and problem based on it

  An object of mass 500 g moves along the x-axis with speed v = 4√x m/s. The magnitude of the force acting on it is:

  Options

  • Option A

    8 N

  • Option B

    5 N

  • Option C

    6 N

  • Option D

    4 N

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• MCQmediumNewtons law of motion and Frictionnewton second law and problem based on it

  A particle of mass m falls from rest through a resistive medium having resistive force, F = -kv, where v is the velocity of the particle and k is a constant. Which of the following graphs represents velocity (v) versus time (t) ?

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQmediumNewtons law of motion and Frictionnewton second law and problem based on it

  A particle moves in x-y plane under the influence of a force F such that its linear momentum is P(t) = î cos(kt) - ĵ sin(kt). If k is constant, the angle between F and P will be :

  Options

  • Option A

    π/2

  • Option B

    π/6

  • Option C

    π/4

  • Option D

    π/3

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• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  A 2 kg body initially has velocity v = (3, 4, 0) m/s. It enters a region with a constant force of 6 N along +z and remains there for 5/3 s. Its velocity on leaving the region is:

  Options

  • Option A

    (4, 3, 5) m/s

  • Option B

    (3, 4, 5) m/s

  • Option C

    (3, 4, -5) m/s

  • Option D

    (3, 4, √5) m/s

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• MCQmediumNewtons law of motion and Frictionnewton second law and problem based on it

  A 4 kg mass moves under the influence of a force $\vec{F}$= (4t³î - 3tĵ) N where t is the time in second.

  If mass starts from origin at t = 0, the velocity and position after t = 2s will be :

  Options

  • Option A

    $\vec{v}$ = 3î + 3 /2ĵ , $\vec{r}$= 6/5 î + ĵ

  • Option B

    $\overrightarrow{v}$= 4î - 3 /2 ĵ , $\vec{r}$= 8/5 î - ĵ

  • Option C

    $\vec{v}$= 4î + 5 / 2 ĵ , $\vec{r}$= 8/5 î + 2ĵ

  • Option D

    $\vec{v}$= 4î - 3 /2 ĵ, $\vec{r}$ = 6/5 î - ĵ

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