Gravitation
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Questions and Answers

What is the effect on the weight of objects on the equator if the earth starts rotating 17 times faster?

  • The weight of objects on the equator remains the same
  • The weight of objects on the equator becomes zero (correct)
  • The weight of objects on the equator decreases by half
  • The weight of objects on the equator increases

    • What is the relationship between the gravitational mass and the inertial mass of a body?

  • The gravitational mass and the inertial mass are unrelated
  • The gravitational mass and the inertial mass are equal (correct)
  • The gravitational mass is always greater than the inertial mass
  • The inertial mass is always greater than the gravitational mass

    • What is the unit of measurement for the gravitational mass of a body?

  • Kilograms per meter
  • Meters per second
  • Newtons per meter
  • Kilograms (correct)

    • What is the effect on the gravitational force between two objects if the distance between them is doubled?

    <p>The gravitational force decreases by a factor of 4</p> Signup and view all the answers

    What is the value of g at the equator if the earth starts rotating 17 times faster?

    <p>60 times the original value of g</p> Signup and view all the answers

    What is the value of g at infinite distance from the Earth?

    <p>0</p> Signup and view all the answers

    What is the value of the acceleration due to gravity at the surface of the earth at mean sea level?

    <p>9.8 m/s²</p> Signup and view all the answers

    Due to which of the following factors does the value of acceleration due to gravity vary?

    <p>All of the above</p> Signup and view all the answers

    What is the effect of the rotation of the Earth on the value of g at the equator?

    <p>It decreases the value of g</p> Signup and view all the answers

    What is the relationship between the equatorial radius and the polar radius of the earth?

    <p>The equatorial radius is about 21 km longer than the polar radius</p> Signup and view all the answers

    What is the angular velocity of the Earth's rotation for which a body at the equator will become weightless?

    <p>ω = √(g/R)</p> Signup and view all the answers

    What is the value of the acceleration due to gravity at the centre of the earth?

    <p>0</p> Signup and view all the answers

    What is the direction of the force of gravity on a body at the surface of the earth?

    <p>Toward the centre of the earth</p> Signup and view all the answers

    What is the difference in the value of g between the poles and the equator?

    <p>0.034 m/s²</p> Signup and view all the answers

    What is the effect of the Earth's rotation on the value of g?

    <p>It decreases the value of g at the equator</p> Signup and view all the answers

    How does the rotation of the Earth affect the measurement of inertial mass?

    <p>It decreases the measured inertial mass</p> Signup and view all the answers

    What would happen to the apparent weight of a body at the equator if the Earth's rotation period were to decrease?

    <p>The apparent weight would increase</p> Signup and view all the answers

    What is the effect on the apparent weight of a body at the equator if the earth starts rotating faster?

    <p>It decreases</p> Signup and view all the answers

    How can the inertial mass of a body be measured?

    <p>By applying a force to the body</p> Signup and view all the answers

    What is the effect of gravity on the inertial mass of a body?

    <p>It has no effect on the inertial mass</p> Signup and view all the answers

    What is the period of rotation of the earth in hours?

    <p>1.40 hours</p> Signup and view all the answers

    What is the reason for the apparent weight reduction of a body at the equator due to the Earth's rotation?

    <p>Centrifugal force exerted by the Earth's rotation</p> Signup and view all the answers

    What is the unit of measurement for the angular velocity of the Earth's rotation?

    <p>Radian per second</p> Signup and view all the answers

    How can the inertial mass of a body be measured?

    <p>By measuring the force required to produce a certain acceleration</p> Signup and view all the answers

    How does the Earth's rotation affect the inertial mass of a body?

    <p>It has no effect on the inertial mass of the body</p> Signup and view all the answers

    What is the effect of the Earth's rotation period on the acceleration due to gravity at the equator?

    <p>It decreases the acceleration due to gravity at the equator</p> Signup and view all the answers

    What happens to the apparent weight of a body at a point on the surface of the earth, due to the Earth's rotation?

    <p>It decreases by a factor of cos²λ</p> Signup and view all the answers

    At what latitude is the effect of the Earth's rotation on the apparent weight of a body maximum?

    <p>At the equator, where λ = 0°</p> Signup and view all the answers

    What is the angular velocity of the Earth's rotation, at a point on the surface of the earth?

    <p>It is a function of the latitude, λ</p> Signup and view all the answers

    What is the effect of the Earth's rotation on the acceleration due to gravity, at a point on the surface of the earth?

    <p>It decreases the acceleration due to gravity</p> Signup and view all the answers

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