The reading on a spring balance with a holder and ten identical discs is 4.5 N4.5\text{ N}4.5 N. Seven discs are removed and the reading becomes 1.7 N1.7\text{ N}1.7 N. What is the weight of one disc?
209 exam-style questions on CIE IGCSE Physics Mass and weight, covering Mass and weight. Each one has a worked solution and a mark scheme showing where the marks go.