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The apparent weight of man inside a lift...

The apparent weight of man inside a lift moving up with certain acceleration is 900N. When the lift is coming down with the same acceleration apparent weight is found to be 300N. The mass of the man is (g = `10 ms^(-2)`)

A

45 kg

B

60 kg

C

75 kg

D

80 kg

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The correct Answer is:
B
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AAKASH SERIES-NEWTONS LAWS OF MOTION -PRACTICE SHEET (EXERCISE - III) (LEVEL - I) (Straight Objective Type Questions)
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  3. A 60kg man is inside a lift which is moving up with an acceleration of...

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  4. When an empty lift is moving down with an acceleration of g/4 ms^(-2) ...

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  8. A reference frame attached to the earth a) is an inertial frame by d...

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  9. An elevator accelerates upwards at a constant rate. A uniform string o...

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  10. A 60 kg man stands on a spring scale in the lift. At some instant he f...

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  11. For ordinary terrestrial experiments, the observer in an inertial fram...

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  12. In the figure shown the man of mass 60kg is liftinga block of mass 10k...

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  13. A man of mass 40kg is standing on a weighting machine kept on the floo...

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  14. In the figure shown the man of mass 60kg is lowering a block of mass 1...

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  15. Find the reading of the machine. Given mass of box =5kg, mass of man =...

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  16. Find the reading of the machine. Given mass of box =5kg, mass of man =...

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  17. The above question if weighing machine reads correct reading then find...

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  18. Two blocks A and B are kept in an elevator which is moving up with an ...

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