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Gravitation

JEE Mains Physics. Try each one first, then open its answer.

Top 10 JEE Mains PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 14 times: 2021 Paper 1, 2021 Paper 3, 2021 Paper 8, 2021 Paper 9, 2021 Paper 24, 14 Jun 2022, 29 Jun 2022, 24 Jan 2023, 29 Jan 2023, 29 Jan 2024, 5 Apr 2024, 23 Jan 2025, 24 Jan 2025, 2 Apr 2026 S1. This one: 2 Apr 2026 S1 See all 14 of this type

    5
    A planet ( P1P_{1} ) is moving around the star of mass 2 M in the orbit of radius R . Another planet ( P2P_{2} ) is moving around another star of mass 4 M in a orbit of radius 2R2R. Ratio of time periods of revolution of P2P_{2} and P1P_{1} is ____\_\_\_\_ .

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  2. Question 2

    This type asked 8 times: 14 Jun 2022, 25 Jun 2022, 25 Jul 2022, 24 Jan 2023, 31 Jan 2023, 6 Apr 2023, 4 Apr 2024, 4 Apr 2026 S2. This one: 4 Apr 2026 S2 See all 8 of this type

    5
    The height in terms of radius of the earth (R)(R), at which the acceleration due to gravity becomes g9\frac{g}{9}, where gg is acceleration due to gravity on earth's surface, is ____\_\_\_\_ .

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  3. Question 3

    This type asked 8 times: 29 Jun 2022, 1 Feb 2023, 12 Apr 2023, 13 Apr 2023, 30 Jan 2024, 31 Jan 2024, 28 Jan 2025, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 8 of this type

    5
    The escape velocity from a spherical planet A is 10 km/skm/s. The escape velocity from another planet B whose density and radius are 10%10\% of those of planet A, is ____\_\_\_\_ m/sm/s.

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  4. Question 4

    This type asked 6 times: 2021 Paper 23, 2021 Paper 26, 29 Jul 2022, 31 Jan 2023, 29 Jan 2024, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 6 of this type

    3
    When one moves from a point 16 km below the earth's surface to a point 16 km above the earth's surface. The change in g is approximately α%\alpha\%. The value of α\alpha is ____\_\_\_\_ . (Take radius of the earth =6400 km= 6400\text{ }km.)

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  5. Question 5

    This type asked 5 times: 26 Jul 2022, 27 Jul 2022, 30 Jan 2023, 15 Apr 2023, 2 Apr 2026 S2. This one: 2 Apr 2026 S2 See all 5 of this type

    6
    If a body of mass 1 kg falls on the earth from infinity, it attains velocity (v) and kinetic energy (k) on reaching the surface of earth. The values of v and k respectively are ____\_\_\_\_ . (Take radius of earth to be 6400 km and g=9.8 m/s2g = 9.8\text{ }m/s^{2} )

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  6. Question 6

    This type asked 5 times: 2021 Paper 1, 2021 Paper 17, 2021 Paper 24, 29 Jan 2023, 15 Apr 2023. This one: 15 Apr 2023 See all 5 of this type

    3
    Two identical particles each of mass ' mm ' go round a circle of radius aa under the action of their mutual gravitational attraction. The angular speed of each particle will be:

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  7. Question 7

    This type asked 4 times: 2021 Paper 20, 27 Jun 2022, 31 Jan 2024, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 4 of this type

    10
    Net gravitational force at the centre of a square is found to be F1F_{1} when four particles having mass M,2M,3MM,2M,3M and 4M4M are placed at the four corners of the square as shown in figure and it is F2F_{2} when the positions of 3M3M and 4M4M are interchanged. The ratio F1F2\frac{F_{1}}{F_{2}} is α5\frac{\alpha}{\sqrt{5}}. The value of α\alpha is ____\_\_\_\_ .

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  8. Question 8

    This type asked 4 times: 2021 Paper 10, 2021 Paper 25, 25 Jan 2023, 7 Apr 2025. This one: 7 Apr 2025 See all 4 of this type

    81
    Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The radius vector from the Sun to a planet sweeps out equal areas in equal intervals of time and thus areal velocity of planet is constant. Reason (R) : For a central force field the angular momentum is a constant. In the light of the above statements, choose the most appropriate answer from the options given below :

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  9. Question 9

    This type asked 4 times: 27 Jul 2022, 8 Apr 2023, 12 Apr 2023, 2 Apr 2025. This one: 2 Apr 2025 See all 4 of this type

    100
    A satellite of mass 1000 kg is launched to revolve around the earth in an orbit at a height of 270 km from the earth's surface. Kinetic energy of the satellite in this orbit is ____\_\_\_\_ ×1010 J\times 10^{10}\text{ }J. (Mass of earth =6×1024 kg= 6 \times 10^{24}\text{ }kg, Radius of earth == 6.4×106 m6.4 \times 10^{6}\text{ }m, Gravitational constant == 6.67×10−11Nm2 kg−26.67 \times 10^{- 11}{Nm}^{2}{\text{ }kg}^{- 2} )

  10. Question 10

    This type asked 4 times: 8 Apr 2023, 8 Apr 2024, 23 Jan 2025, 29 Jan 2025. This one: 29 Jan 2025 See all 4 of this type

    99
    Two planets, AA and BB are orbiting a common star in circular orbits of radii RAR_{A} and RBR_{B}, respectively, with RB=2RAR_{B}= 2R_{A}. The planet BB is 424\sqrt{2} times more massive than planet AA. The ratio (LBLA)\left( \frac{L_{B}}{L_{A}} \right) of angular momentum (LB)\left( L_{B} \right) of planet BB to that of planet A(LA)A\left( L_{A} \right) is closest to integer ____\_\_\_\_