A student measures the original length of a spring. They then hang different loads from the spring and measure its length for each load.
The table below shows the results:
load / Nlength / cm015.02.015.84.016.66.017.58.018.310.019.0 \begin{array}{|c|c|} \hline \text{load / N} & \text{length / cm} \\ \hline 0 & 15.0 \\ 2.0 & 15.8 \\ 4.0 & 16.6 \\ 6.0 & 17.5 \\ 8.0 & 18.3 \\ 10.0 & 19.0 \\ \hline \end{array} load / N02.04.06.08.010.0length / cm15.015.816.617.518.319.0What is the extension of the spring when a load of 6.0 N is applied?
0.9 cm0.9\text{ cm}0.9 cm
2.5 cm2.5\text{ cm}2.5 cm
4.0 cm4.0\text{ cm}4.0 cm
17.5 cm17.5\text{ cm}17.5 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.