A horizontal laboratory test arm has negligible weight and is pivoted at its centre. A downward force of 6 N acts 0.30 m to the left of the pivot. A second downward force acts on the right, 0.45 m from the pivot.
Which force on the right will keep the test arm balanced?
A force of 4 N
A force of 9 N
A force of 1.8 N
A force of 6 N
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.