Physics

Problem

A square wooden raft of side

2\,\text{m}

is made from timber of density

600\,\text{kg m}^{-3}

. What minimum thickness should the raft have so that it can just keep afloat a boy of mass

60\,\text{kg}

in still water? Take density of water

=1000\,\text{kg m}^{-3}

. a)

0.030\,\text{m}

0.038\,\text{m}

0.045\,\text{m}

0.015\,\text{m}