- #1

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## Homework Statement

The force required to immerse a wooden

cube of side 4 cm and relative density RD 0.5 completely in water is

1) 16x10

^{-3}kgwt

2) 32x10

^{-3}kgwt

3) 64x10

^{-3}kgwt

4) 128x10

^{-3}kgwt

## Homework Equations

## The Attempt at a Solution

Density of the cube = 0.5 gcm

^{-3}

Volume of cube = 64 cm

^{3}

Weight of the cube = 64 x10

^{-6}x 500 x 9.8 N (1)

Upthrust = 64 x10

^{-6}x 1000 x 9.8 N (2)

Force required = Upthrust - Weight

Subtracting (1) from (2)

Force required = 64 x10

^{-6}x 500 x 9.8 N

1kgwt = 9.8 N

Force required = 32 x10

^{-3}kgwt

Is option 2) the correct answer ?