BRAINCAKESolid Materials
Revision notes for Solid Materials in Edexcel Physics (8PH0). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Hooke's LawTensile forces cause materials to extend and compressive forces cause negative extension.
- Elastic Strain EnergyWork done = force × distance travelled in the direction of the force.
- Force-Extension and Force-Compression GraphsA force-extension graph shows how the extension of a sample changes as the tensile force on it increases.
- StressTensile or compressive stress is a measure of the force within a material sample taking into account the cross-sectional area.
- StrainTensile or compressive strain is a measure of the ratio of the extension to the original length.
- The Young ModulusThe Young modulus is the ratio of stress to strain.
- Stress-Strain Graph Metal WireIf a material is undergoing elastic deformation the graph is a straight line through the origin as the stress is directly proportional to the strain.
- Experiment to Measure the Young ModulusThe length and diameter of a wire about 1 metre long are measured.
- Properties of MaterialsEngineers use precise words to describe how materials behave under a force.
- Exam Style Question - 1Question A steel wire of original length 2.00 m and diameter 0.50 mm hangs vertically.
- Exam Style Question - 1Question A spring obeys Hooke's law.
- Exam Style Question - 1Question A steel cable of length 20 m and cross-sectional area 2.0 × 10-4 m2 supports a load of 3.0 × 104 N.
- Springs in SeriesTwo or more springs are said to be in series when they are connected end-to-end so as to act as a single spring Any external force applied to the…
- Springs in ParallelTwo or more springs are said to be in parallel when they are connected side-by-side so as to act as a single spring.