Gravitation — Practice Quiz
Gujarat Board · Class 9 · Science
Try a 4-question quiz on Gravitation for Gujarat Board Class 9 Science: tap an answer to check it and see why. 43 questions in the full chapter test.
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Quick Quiz: Gravitation
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Who discovered the universal law of gravitation?
The SI unit of the universal gravitational constant G is:
What is meant by free fall?
The acceleration due to gravity on Earth is approximately:
Sample Questions
According to the universal law of gravitation, the gravitational force between two objects is:
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Directly proportional to the product of their masses, Inversely proportional to the square of distance between them, Acting along the line joining their centers
The universal law of gravitation states that gravitational force is directly proportional to the product of masses, inversely proportional to the square of distance, and acts along the line joining the centers of the two objects.
Which of the following statements about mass and weight are correct?
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Mass remains constant everywhere, Weight varies from place to place, Weight is the force with which Earth attracts an object
Mass is constant everywhere and is a scalar quantity. Weight varies with location because it depends on gravity (W = mg), and weight is a force measured in newtons, not kilograms.
The weight of an object on the moon is approximately what fraction of its weight on Earth?
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1/6
The weight of an object on the moon is 1/6th of its weight on Earth because the moon's gravitational acceleration is about 1/6th of Earth's due to its smaller mass and radius.
Thrust is defined as:
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Force acting perpendicular to a surface
Thrust is the force acting perpendicular to a surface. When you press a drawing pin, the force you apply perpendicular to the pin's head is thrust.
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