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Tag: gravitation

. A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate (i) the maximum height to which it rises, (ii) the total time it takes to return to the surface of the earth.?

Class 9 Physics
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Gravitational force on the surface of the moon is only 1 6 as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon and on the earth?

Class 9 Physics
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What do we call the gravitational force between the earth and an object?

Class 9 Physics
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What is the acceleration of free fall?

Class 9 Physics
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What is the importance of universal law of gravitation?

Class 9 Physics
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What happens to the force between two objects, if (i) the mass of one object is doubled? (ii) the distance between the objects is doubled and tripled? (iii) the masses of both objects are doubled?

Class 9 Physics
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If the moon attracts the earth, why does the earth not move towards the moon?

Class 9 Physics
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The earth and the moon are attracted to each other by gravitational force. Does the earth attract the moon with a force that is greater or smaller or the same as the force with which the moon attracts the earth? Why?

Class 9 Physics
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Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

Class 9 Physics
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You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

Class 9 Physics
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You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?

Class 9 Physics
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Gravitation

Class 9 Physics
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