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Questions and Answers
What is the force of attraction between two objects in the universe?
What is the force of attraction between two objects in the universe?
- Proportional to the product of their masses (correct)
- Proportional to the sum of their masses
- Inversely proportional to the square of the distance between them
- Inversely proportional to the cube of the distance between them
What is the measure of an object's inertia?
What is the measure of an object's inertia?
- Weight
- Mass (correct)
- Gravity
- Force
What is responsible for the motion of objects under the influence of gravity?
What is responsible for the motion of objects under the influence of gravity?
- Mass
- Weight
- Force (correct)
- Gravitation
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Study Notes
- Every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them.
- The force of attraction is along the line joining the centres of two objects.
- Gravitation is a universal law which successfully explains several phenomena like the force that binds us to the earth, the motion of moon around the earth, the motion of planets around the sun, the tides due to the moon and the sun.
- Gravity is a force which is exerted between masses and it is responsible for the motion of objects under the influence of gravity.
- Mass is the measure of an object's inertia and it remains the same everywhere in the universe.
- Weight is the force of attraction of the earth on an object and is known as the weight of the object.
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