- #1

moniquert

- 6

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## Homework Statement

A 2.04 kg piece of wood floats on water of density 1006.2 kg/m3. If the density of wood is 486.0 kg/m3 and the density of lead is 11300 kg/m3, what minimum mass of lead, hung from it by a string, will cause it to sink?

## Homework Equations

Bouyant force= (density of water)(Volume displaced)(gravity 9.81)

Volume= (Pie)(r)squared(height)

Density= mass/volume

## The Attempt at a Solution

I found the weight of the log by doing (9.81)(2.04)=20.0124N. Then i found volume of the log (2.04)/486=0.004197531 metres cubed. Then i found bouyant force upwards (1006.2)(.004197531)(9.81)= 41.43308N. Then I subtracted them to get how much weight is required for it just to stay a float 21.42N. I don't Know what to do after that help please.