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Newton's laws of motion can be applied t...


Newton's laws of motion can be applied to a block in liquid also force due to liquid (e.g. upthrust) are also considered in addition to other forces. A small block of weight W is kept inside. The block is attached with a string connected to the bottom of the vessel. Tension in the string is `W//2`
Q. The string is cut. find the time when it reaches the surface of the liquid

A

`1/sqrt(5) s`

B

`sqrt(5) s`

C

`sqrt(3) s`

D

`2/sqrt(5) s`

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The correct Answer is:
D
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