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An empty plastic box of mass 5 kg is obs...

An empty plastic box of mass 5 kg is observed to accelerate up at the rate of `g//6` when placed deep inside water. What mass of sand should be put inside the box so that it may accelerate dow at the rate of `g//6` ?

A

`m//5`

B

`2 m//5`

C

`3m//5`

D

`4m//5`

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The correct Answer is:
B
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AAKASH SERIES-APPENDICES (REVISION EXERCISE)-LAW OF MOTION
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  2. Two bodies of masses 4 kg and 6 kg connected by means of a light strin...

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  5. In the arrangment shown in the figure, the ratio of tensions T(1): T(2...

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  6. A monkey a mass 15 kg is climbing on a rope with one end fixed to the ...

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  8. A homogeneous rod of length L is acted upon by two forces F(1) and F(2...

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  10. A chain consisting of 5 links each of mass 0.1 kg is lifted vertically...

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  11. A light rope fixed at one end of a wooden clamp on the ground passes o...

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  12. Two masses 5 kg and 3 kg are suspended from the ends of an unstretchab...

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  13. In the figure, blocks A, B and C of mass m each have acceleration a1, ...

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  14. The tension in the string connected between blocks is

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  15. The reading in the spring balance is

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  17. A man of mass 60 kg is standing on a weighing machine kept in a box of...

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  18. In the arrangement shown in the figure, the acceleration of the pulley...

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