Question

What kind of simple machine is a boat oar?

Answer 1

The fulcrum is a simple machine is a boat oar

Answer 2

to the out side observer it appear the blade is stationary and the boat is "levered" passed the submerged blade.The fulcrum is discontinuous,moving from stroke to stroke.FISA(the governing body for rowing) defines the oar/oarlock system as a class 2 lever.