A trapdoor is held horizontal by a rope attached at the edge furthest from the hinge, pulling at an angle to the trapdoor. The rope is re-attached so that it pulls at right angles to the trapdoor at the same point, with the same tension. What happens to the moment of the tension about the hinge?
It decreases, because the line of action of the tension is now shorter
It increases, because the perpendicular distance from the hinge is now larger
It stays the same, because the tension and the attachment point are unchanged
It stays the same, because only the direction of the tension has been changed
40 exam-style questions on AQA GCSE Physics 5.4 Moments, levers and gears, covering 5.4 Moments, levers and gears. Each one has a worked solution and a mark scheme showing where the marks go.