A uniform ruler balances horizontally on a pivot at its centre. Equal weights are hung at equal distances on opposite sides. One weight is replaced by a weight twice as large. Where must the larger weight be placed to restore balance?
On the opposite side, at twice its original distance.
On the opposite side, at half its original distance.
On the same side, at twice its original distance.
On the same side, at half its original distance.
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.