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Gravitation

Physics · Class 11 · CBSE

PhysicsClass 11CBSEMedium
Q1/15
45s

If the distance between two objects is doubled, the gravitational force between them becomes:

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All 15 questions in this quiz

  1. The energy required to remove an object from Earth's gravitational field is related to:

    1. Kinetic energy only
    2. Escape energy
    3. Heat energy
    4. Chemical energy

  2. The value of g is maximum at:

    1. Earth's centre
    2. Earth's surface
    3. Very high altitude
    4. Space

  3. The orbital velocity of a satellite depends on:

    1. Mass of satellite only
    2. Mass of Earth and orbital radius
    3. Shape of satellite
    4. Colour of satellite

  4. The gravitational force between two objects is always:

    1. Repulsive
    2. Attractive
    3. Zero
    4. Variable in direction

  5. The shape of planetary orbits according to Kepler's first law is:

    1. Circular
    2. Elliptical
    3. Straight line
    4. Parabolic

  6. The value of gravitational acceleration decreases with:

    1. Increase in altitude
    2. Increase in mass of object
    3. Decrease in distance from Earth
    4. Increase in density

  7. A satellite revolves around Earth because:

    1. There is no gravity in space
    2. Earth's gravity provides centripetal force
    3. Satellite has no mass
    4. Air pushes it around Earth

  8. The gravitational potential at infinity is considered to be:

    1. Maximum
    2. Zero
    3. Negative
    4. Infinite

  9. Kepler's second law states that:

    1. Planets move in circles
    2. Planets sweep equal areas in equal times
    3. Planets have equal speeds
    4. Orbits are always stationary

  10. Escape velocity from Earth does not depend on:

    1. Mass of Earth
    2. Radius of Earth
    3. Mass of escaping object
    4. Gravitational constant

  11. The weight of an object on the Moon is less than its weight on Earth because:

    1. Moon has no gravity
    2. Moon has smaller mass and radius
    3. Object loses mass on Moon
    4. Moon rotates faster

  12. The universal gravitational constant G has the SI unit:

    1. Nm²/kg²
    2. N/kg
    3. kg/m²
    4. m/s²

  13. If the distance between two objects is doubled, the gravitational force between them becomes:

    1. Double
    2. Four times
    3. Half
    4. One-fourth

  14. The value of acceleration due to gravity on the surface of Earth is approximately:

    1. 3.8 m/s²
    2. 9.8 m/s²
    3. 15 m/s²
    4. 25 m/s²

  15. The force of attraction between two bodies is directly proportional to:

    1. Sum of their masses
    2. Product of their masses
    3. Difference of their masses
    4. Distance between them