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From the terrace of building of height H...

From the terrace of building of height H, you dropped a ball of mass m. It reached the ground with speed v. Is the relation `mgH = frac(1)(2)mv^2` applicable exactly ? If not, how can you account for the difference ? Will the ball bounce to the same height from where it was dropped?

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CHETANA PUBLICATION-LAWS OF MOTION -EXERCISE
  1. State the formula for calculating work done by a force. Are there any ...

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  2. Justify the statement, 'work and energy are the two sides of a coin'.

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  3. From the terrace of building of height H, you dropped a ball of mass m...

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  4. State the law of conservation of linear momentum. It is a consequence ...

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  5. Two bodies of masses 2 kg and 4 kg are connected at the two ends of a ...

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  6. Ten identical masses (m each) are connected one below the other wih 10...

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  7. A person of mass 60 kg stands on a weighing scale in a lift (elevator)...

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  8. A liquid drop of mass 1 g falls from a cliff 1 km high. It hits the gr...

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  9. A truck of mass 5 tons is travelling on a horizontal road with 36 km h...

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  10. A lighter object A and a heavier object B are initially at rest. Both ...

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  11. Power is rate of doing work or the rate at which energy is supplied to...

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  12. Variation of a force in certain region is given by F= 6x^2 - 4x - 8. I...

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  13. While decreasing linearly from 5 N to 3 N, a force displaces an object...

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  14. 40000 liters of oil of density 0.9 gram per cc is pumped from an oil t...

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  15. Define and explain. (i) Elastic collision.

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  16. Define coefficient of restitution and obtain its value for an elastic ...

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  17. Derive an expression for the velocities of the colliding bodies after ...

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  18. Discus the folwing as special cases of elastic collision and obtain th...

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  19. A bullet of mass m1 travelling with a velocity u strikes a stationary ...

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  20. Explain non head on collision i.e. collision in two dimensions?

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