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A man carrying a load of weight W on his...

A man carrying a load of weight W on his hand jumps from a height. During free fall, the weight of load experienced by man is

A

zero

B

W

C

2W

D

3W

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A man stands on a rotating platform, with his arms stretched horizontally holding a 5 kg weight in each hand. The angular speed of the platform is 30 revolutions per minute. The man then brings his arms close to his body with the distance of each weight from the axis changing from 90cm to 20cm. The moment of inertia of the man together with the platform may be taken to be constant and equal to 7.6 kg m^2 :- Is kinetic energy conserved in the process? If not, from where does the change come about?

MODERN PUBLICATION-GRAVITATION-EXAMPLE
  1. A man carrying a load of weight W on his hand jumps from a height. Dur...

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  2. A particle is thrown up vertically with a velocity of 50 m/s. What wil...

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  3. A particle is thrown up vertically with a velocity of 50 m/s. How high...

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  4. A particle is thrown up vertically with a velocity of 50 m/s. What tim...

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  5. A ball is thrown upwards from the top of a tower 40 m high with a velo...

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  6. An object is relased from a height. Find its speed at t = 1s

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  7. An object is relased from a height. Find its speed at t = 2 s

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  8. An object is relased from a height. Find its speed at t = 3s

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  9. State the universal law of gravitation.

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  10. Write the formula to find the magnitude of gravitational force between...

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  11. What is meant by free fall ?

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  12. What do you mean by acceleration due to gravity?

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  13. What is the difference between the mass of an object and its weight ?

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  14. Why is the weight of an object on the moon of 1/6 its weight on the ea...

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  15. Gravitational force acts on all objects in proportion to their masses....

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  16. What is magnitude of gravitational force between the earth and a 1 kg ...

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  17. If the moon attracts the earth, why does the earth not move towards th...

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  18. What happens to the force between two objects, if the mass of one obje...

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  19. What happens to the force between two objects, if the distance between...

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  20. What happens to the force between two objects, if the masses of both o...

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  21. What is the importance of universal law of gravitation?

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