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A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/ s. calculate when and where the two stones will meet.

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R G PUBLICATION-GRAVITATION-EXAMPLE
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  12. The weight of an object at the centre of the earth of radius R is

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  13. The S.I. unit of gravitational constant is

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  14. Mass of the earth

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  15. The weight of a body of mass 1 kg

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  16. The unit of relative density is

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  17. By doubling the mass of a solid body, its density becomes-

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