A force acts on a door. Which distance is used to calculate the moment of this force about the hinges?
The perpendicular distance from the hinges to the line of action.
The parallel distance from the hinges along the line of action.
The distance along the door from its top edge to its bottom edge.
The distance across the door from its front face to its back face.
102 exam-style questions on Edexcel GCSE Physics 9.2 Moments, covering 9.2.1 Rotational effects of forces and moments, 9.2.2 The principle of moments, and 9.2.3 Levers and gears. Each one has a worked solution and a mark scheme showing where the marks go.