Different loads are hung on a spring. The vertical lengths of the spring under different conditions are as follows:
What is the extension of the spring when the load is 250 N?
15 cm15\text{ cm}15 cm
25 cm25\text{ cm}25 cm
40 cm40\text{ cm}40 cm
55 cm55\text{ cm}55 cm
245 exam-style questions on CIE IGCSE Physics 1.5 Forces, covering 1.5.1a Forces, resultant force and motion, 1.5.1b Load–extension graphs and the spring constant, 1.5.1c Friction and drag, 1.5.1d Force, mass and acceleration, 1.5.1e Motion in a circular path, 1.5.2a Moment of a force, 1.5.2b Principle of moments and equilibrium, and 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.