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A body of mass 40 kg stands on a weighin...

A body of mass 40 kg stands on a weighing machine in an accelerated lift. The reading on the scale of the weighing machine is 300 N. Find the magnitude and direction of acceleration. `(g = 9.8ms^(-2))`

A

2.3 `m//s^2` upward

B

2.3 `m//s^2` downward

C

4.6 `ms//^2` upward

D

4.6 `ms//^2` downward

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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)
  1. A body of mass 40 kg stands on a weighing machine in an accelerated li...

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  2. The apparent weight of man inside a lift moving up with certain accele...

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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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  5. A lift carries a person with a weighting machine in it, up and then do...

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  6. A block of mass 5kg is suspended by means of a uniform cord of mass 2k...

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  7. A block of mass 1 kg is at rest relative to a smooth wedge moving left...

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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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  19. A block slides down from top of a smooth inclined plane of elevation t...

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