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A stone falls from a building and reache...

A stone falls from a building and reaches the ground 2.5 seconds later. How high is the building? `(=9 .8 m//s^2) `

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The correct Answer is:
30.6 m
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LAKHMIR SINGH & MANJIT KAUR-GRAVITATION-Exercise
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  2. A piece of stone is thrown vertically upwards. It reaches the maximum ...

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  3. A stone falls from a building and reaches the ground 2.5 seconds later...

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  4. A stone is dropped from a height of 20 m . (i) How long will it take...

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  5. A stone is thrown vertically upwards with a speed of 20 m/s. How high ...

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  6. When a cricket ball is thrown vertically upwards, it reaches a maximum...

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  7. Write the differences between mass and weight of an object.

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  8. Can a body have mass but no weight ?

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  9. A force of 20 N acts upon a body whose weight is 9.8 N. what is the ma...

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  10. A stone resting on the groud has a gravitional force of 20 N acting on...

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  11. An oject has mass of 20 kg on earth .What will be its (i) mass and (ii...

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  12. Which is more fundamental the mass of a body or its weight ? Why ?

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  13. How much is the weight of an object on the moon as compard to its weig...

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  14. Define universal gravitational constant. Give its value with SI units.

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  15. What do you undersatand by the term accelation due to gravity of earth...

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  16. State and explain briefly Keplars laws of planetary motion.

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  17. The mass of a planet is 6xx10^(24) kg and its diameters is 12.8 xx 10^...

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  18. A body is thrown vertically upward with velocity u, the greatest heigh...

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  19. The mass of moon is about 0.012 times that of earth and its diameter i...

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  20. The value of g on the surface of the moon

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