A technician bends a plastic cable guide by applying forces at two separated points. The technician records the distance between the ends of the guide.
| Stage of test | Distance between ends in mm |
|---|---|
| Before the forces are applied | 80 |
| While the forces are applied | 65 |
| After the forces are removed | 80 |
Which conclusion is supported by the complete set of readings?
The guide was inelastically distorted because its end spacing changed while the forces were being applied.
The guide was inelastically distorted because its end spacing changed again when the forces were removed.
The guide was not distorted because its end spacing before loading and after unloading was the same.
The guide was elastically distorted because its end spacing changed under force and returned to its initial value after removal.
102 exam-style questions on Edexcel GCSE Physics 15.1 Forces and springs, covering 15.1.1 Elastic and inelastic distortion, 15.1.2 The spring constant, 15.1.3 Work done in stretching a spring, and 15.1.4 Linear and non-linear force–extension. Each one has a worked solution and a mark scheme showing where the marks go.