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A cylindrical container of length L is f...

A cylindrical container of length `L` is full to the brim with a liquid which has mass density `rho`.it is placed on a weight -scale, the scale reading is `W`. A light ball of volume `V` and mass `m` which woUld float on the liquid, if allowed to do so, is pushed gently downand held beneath the surface of the liquid with a rigid rod of negligible volume as shwon on the left.
What is the tension `T` in the string?

A

`(rhoV-m)g`

B

`rhoVg`

C

`mg`

D

none

Text Solution

Verified by Experts

The correct Answer is:
A
`T+mg=0`

`impliesT=B-mg=Vrhog-mg=(Vrho-m)g`
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