Question

1: A rectangular plank of pine wood is L=3.6m long, W=0.46m wide and H=0.10m deep. The density of pine, ppine= 500kg/m^3.

a) if this plank is floating in fresh water pw=1000kg/m^3, what fraction of it will be submerged?

b) if a swimmer with mass ms=75kg climbs onto the plank and lied on it with body completely out of the water, what fraction of the plank is now submerged?

Answer 1