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Gravitation

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Universal Law of Gravitation

Subtopic

Universal Law of Gravitation under Gravitation for Grade 9 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In the mathematical formula for the Universal Law of Gravitation, what is the correct SI unit for the Universal Gravitational Constant (GG)?

    A.

    Nm2kg2N m^{2} kg^{2}

    B.

    Nm2kg−2N m^{2} kg^{-2}

    C.

    Nkg2m−2N kg^{2} m^{-2}

    D.

    Nmkg−2N m kg^{-2}

  2. 2.

    If the product of the masses of two objects is tripled, and the distance is kept constant, the gravitational force:

    A.

    Triples

    B.

    Remains constant

    C.

    Reduces to one-third

    D.

    Increases by nine times

  3. 3.

    What is the value of GG on the surface of the Moon compared to the Earth?

    A.

    It is 1/61/6 of the value on Earth

    B.

    It is 66 times the value on Earth

    C.

    It is exactly the same

    D.

    It is zero

Download the worksheet for Gravitation - Universal Law of Gravitation to practice offline. It includes additional chapter-level practice questions.

Free Fall and Acceleration due to Gravity

Subtopic

Free Fall and Acceleration due to Gravity under Gravitation for Grade 9 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Why does a piece of paper fall slower than a crumpled ball of paper in air?

    A.

    Gravity acts less on the flat paper

    B.

    Flat paper has less mass

    C.

    Air resistance is higher for the flat paper

    D.

    Gravity only acts on crumpled objects

  2. 2.

    An object reaches the maximum height in 33 seconds. How long will it take to fall back to the ground from that height?

    A.

    1.5 s1.5\ s

    B.

    3 s3\ s

    C.

    6 s6\ s

    D.

    9 s9\ s

  3. 3.

    If an object is moving upwards, the direction of acceleration due to gravity is:

    A.

    Upwards

    B.

    Downwards

    C.

    Sideways

    D.

    It becomes zero

Download the worksheet for Gravitation - Free Fall and Acceleration due to Gravity to practice offline. It includes additional chapter-level practice questions.

Mass and Weight

Subtopic

Mass and Weight under Gravitation for Grade 9 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Mass is measured by using which of the following?

    A.

    Spring balance

    B.

    Common beam balance

    C.

    Thermometer

    D.

    Barometer

  2. 2.

    If the acceleration due to gravity on Earth is 9.8 m/s29.8\text{ m/s}^2, what is the weight of a 0.5 kg0.5\text{ kg} ball?

    A.

    9.8 N9.8\text{ N}

    B.

    4.9 N4.9\text{ N}

    C.

    19.6 N19.6\text{ N}

    D.

    0.5 N0.5\text{ N}

  3. 3.

    The ratio of an object's weight on the Moon to its weight on Earth is approx:

    A.

    6:16:1

    B.

    1:11:1

    C.

    1:61:6

    D.

    3:13:1

Download the worksheet for Gravitation - Mass and Weight to practice offline. It includes additional chapter-level practice questions.

Thrust and Pressure

Subtopic

Thrust and Pressure under Gravitation for Grade 9 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The property of fluids to exert an upward force on an object is called ________.

    A.

    Viscosity

    B.

    Buoyancy

    C.

    Density

    D.

    Gravity

  2. 2.

    If a force of 50 N50 \text{ N} acts on an area of 0.5 m20.5 \text{ m}^2, the pressure is:

    A.

    100 Pa100 \text{ Pa}

    B.

    25 Pa25 \text{ Pa}

    C.

    50 Pa50 \text{ Pa}

    D.

    5 Pa5 \text{ Pa}

  3. 3.

    When a body is weighed in water, its weight ________.

    A.

    Appears to increase

    B.

    Appears to decrease

    C.

    Remains unchanged

    D.

    Becomes negative

Download the worksheet for Gravitation - Thrust and Pressure to practice offline. It includes additional chapter-level practice questions.

Archimedes’ Principle and Buoyancy

Subtopic

Archimedes’ Principle and Buoyancy under Gravitation for Grade 9 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What happens to the level of water in a beaker when a piece of ice floating in it melts?

    A.

    It rises

    B.

    It falls

    C.

    It remains the same

    D.

    It first rises then falls

  2. 2.

    If an object is partially submerged in water, the buoyant force depends on:

    A.

    The total volume of the object

    B.

    The volume of the part inside the water

    C.

    The weight of the object in air

    D.

    The shape of the object

  3. 3.

    A piece of wood is held under water and then released. It immediately comes to the surface because:

    A.

    Its weight is more than the upthrust

    B.

    The upthrust is more than its weight

    C.

    Gravity stops acting on it

    D.

    Water pushes it from the bottom only

Download the worksheet for Gravitation - Archimedes’ Principle and Buoyancy to practice offline. It includes additional chapter-level practice questions.

Gravitation - CBSE Class 9 Science Notes & Revision | Krit.club