A uniform lighting rail is 1.20 m long and weighs 24 N. It rests on a single support 0.45 m from its left-hand end.
An installer attaches an 8.0 N lamp to the rail. The rail must remain horizontal after the lamp is attached.
Where must the lamp be attached?
0.05 m0.05\ \mathrm{m}0.05 m to the left of the support
0.45 m0.45\ \mathrm{m}0.45 m to the left of the support
0.45 m0.45\ \mathrm{m}0.45 m to the right of the support
0.15 m0.15\ \mathrm{m}0.15 m to the left of the support
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.