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A man carries a load of 50 kg through a ...

A man carries a load of `50 kg` through a height of `40 m` in `25` seconds. If the power of the man is `1568 W`, his mass is

A

5 kg

B

1000 kg

C

200 kg

D

50 kg

Text Solution

Verified by Experts

The correct Answer is:
`(4)`

`P = W/t = (m+ M)gh/t`
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NARAYNA-WORK , ENERGY & POWER -EXERCISE -1 (H.W)
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  2. A crane can lift up 10,000 kg of coal in 1 hour form a mine of 180 m d...

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  3. A man carries a load of 50 kg through a height of 40 m in 25 seconds. ...

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  4. An electric motor creates a tension of 4500 newton in a hoisting cable...

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  5. A juggler throws continuously balls at the rate of three in each secon...

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  6. A bucket tied at the end of a 1.6m long string is whirled in a verticl...

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  7. A body of mass 2 kg attached at one end of light string rotated along ...

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  8. A pilot of mass m can bear a maximum apparent weight 7 times of mg. Th...

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  9. The length of ballistic pendulum is 1 m and mass of its block is 0.98 ...

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  10. A simple pendulum is oscillating with an angular amplitude 60^@. If ma...

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  11. A body is moving in a vertical circle such that the velocities of body...

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  12. A ball of mass 0.6 kg attached to a light inextensible string rotates ...

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  13. Two particles of same mass m moving with velocities u(1) and u(2) coll...

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  14. A ball impinges directly on a similar ball at rest. If 1/4 ^(th) of th...

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  15. n bullets per sec each of mass m moving with velocity v strike normall...

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  16. A heavy nucleus at rest breaks into two fragments which fly off with v...

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  17. A 6 kg mass travelling at 2.5 ms^(-1) collides head on with a stationa...

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  18. A body of mass 10 kg moving with a velocity of 5 ms^(-1) hits a body o...

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  19. A block of mass 1 kg moving with a speed of 4 ms^(-1), collides with a...

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  20. A marble going at a speed of 2 ms^(-1) hits another marble of equal m...

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