A technician turns a winch crank about its pivot in two tests. In both tests the technician's hand is on the crank handle, 0.40 m from the pivot. The table gives the force applied and the perpendicular distance from the pivot to the line of action of the force in each test.
| Test | Force (N) | Perpendicular distance from pivot to line of action (m) |
|---|---|---|
| A | 30 | 0.40 |
| B | 45 | 0.24 |
Calculate the moment of the force in each test and state which test produces the larger moment.
In test B, the technician keeps the force at 45 N and keeps the hand at the same place on the handle, but changes the direction of the force so that the moment is as large as possible.
Predict the new moment and explain your prediction.
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.