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 Freely falling object: Is the object which moves towards the Earth due to force of gravity |
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 Acceleration due to gravity: It is the acceleration produced in an object due to force of gravity |
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 Equations of motion for a freely falling object are: |
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 Equations of motion for an object moving against gravity are: |
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 Acceleration due to gravity varies from place to place |
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 Acceleration due to gravity is zero at the centre of the Earth |
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 Acceleration due to gravity is independent of the mass of the object |
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 Newton's third law of motion is applicable to force of gravitation |
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 Mass is defined as the amount of matter contained in it |
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 SI unit of mass is Kilogram |
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 Mass remains constant throughout the universe |
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 Mass of an object can never be equal to zero |
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 Mass is a scalar quantity |
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 Weight is the force with which an object is pulled towards the centre of the Earth |
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 SI unit of weight is Newton |
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 W= mg |
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 Weight is a Vector quantity |
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 Weight of an object can be equal to zero i.e., when g is equal to zero |
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 Weight varies from place to place |
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 1kg.Wt = 9.8 N |
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 Projectile is an object thrown into space horizontally under the action of Earth's gravity |
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 Trajectory is the path followed by a projectile |
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