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Newton's Laws of Motion JEE physics - Newton's Laws of Motion

CBSE - STD 12 Science - JEE physics (CBSE - English Medium). 256 questions in this chapter.

Question types

Newton's Laws of Motion question types

256 questions across 2 question groups — pick any mix to generate a JEE physics paper with step-by-step answer keys.

256
Questions
2
Question groups
5
Question types
Sample Questions

Newton's Laws of Motion questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 2Assertion & Reason1 Mark
Assertion : A body subjected to three concurrent forces cannot be in equilibrium.
Reason : If large number of concurrent forces acting on the same point, then the point will be in equilibrium, if sum of all the forces is equal to zero.
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Q 4Assertion & Reason1 Mark
Assertion : A reference frame attached to earth is an inertial frame of reference.
Reason : The reference frame which has zero acceleration is called a non inertial frame of reference.
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Q 5Assertion & Reason1 Mark
Assertion : Newton's third law of motion is applicable only when bodies are in motion.
Reason : Newton's third law applies to all types of forces, e.g. gravitational, electric or magnetic forces etc.
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Q 6MCQ1 Mark
When the speed of a moving body is doubled
  • A
    Its acceleration is doubled
  • B
    Its kinetic energy is doubled
  • C
    Its potential energy is doubled
  • ✓
    None of these.

Answer: D.

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Q 7MCQ1 Mark
If in a stationary lift, a man is standing with a bucket full of water, having a hole at its bottom. The rate of flow of water through this hole is $0$ . If the lift starts to move up and down with same acceleration and then that rates of flow of water are and , then
  • ✓
    $ Q_1 > Q_0 > Q_2$
  • B
    $ Q_2 > Q_0 > Q_1$
  • C
    $ Q_2 > Q_1 > Q_0$
  • D
    None of these.

Answer: A.

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Q 8MCQ1 Mark
A pulley fixed to the ceilling carries a string with blocks of mass $m$ and $3 m$ attached to its ends. The masses of string and pulley are negligible. When the system is released, its centre of mass moves with what acceleration
  • A
    $g/5$
  • ✓
    $g / 4$
  • C
    $g / 2$
  • D
    $-g / 2$

Answer: B.

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Q 9MCQ1 Mark
A mass of $10 gm$ is suspended by a string and the entire system is falling with a uniform acceleration of $400 cm / sec ^2$. The tension in the string will be $\left(g=980 cm / sec ^2\right)$
  • ✓
    $5,800$ dyne
  • B
    $3,800$ dyne
  • C
    $11,800$ dyne
  • D
    $13,800$ dyne

Answer: A.

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