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Cylindrical block of area of cross-secti...


Cylindrical block of area of cross-section A and of material of density `rho` is placed in a liquid of density one third of density of block. The block compress in the spring is one-third of te length of the block. if acceleration due to gravity is g, the spring constant of the spring is

A

`rhoAg`

B

`2rhoAg`

C

`2rhoAg//3`

D

`rho Ag//3`

Text Solution

Verified by Experts

The correct Answer is:
B
`mg=F_(b)+kx rArr Al rhog =(Alrhog)/(3) + k((l)/(3))`
`rArr k = 2 A rho g`
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