A sailor is using a winch to hoist a sail on a boat. Fig. 3.1 shows the sailor as he turns the winch.
(a)[3]
Calculate the moment of this force about the pivot.
(b(i))[2]
Describe two useful energy transfers when the sailor uses the winch to raise the sail.
(b(ii))[1]
Describe one non-useful energy transfer when the sailor uses the winch to raise the sail.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Moment = force multiplied by perpendicular distance from pivot” …