A laser sensor records the vertical position of a point on a vibration-testing platform relative to a fixed reference.
The table shows the measurements taken before the platform is adjusted.
| measurement | reading |
|---|---|
| number of complete oscillations | 18 |
| time for these oscillations | 2.4 s |
| highest vertical position during the oscillations | +2.5 mm |
| lowest vertical position during the oscillations | -6.5 mm |
The platform is adjusted so that the frequency doubles and the vertical distance between the highest and lowest positions increases by 2.0 mm.
Calculate the period and the amplitude of the oscillations after the adjustment.
112 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties, covering 4.1.1 Waves transfer energy and information, 4.1.2 Frequency, wavelength, amplitude, period and wavefronts, 4.1.3 Longitudinal and transverse waves, 4.1.4 The wave speed equations, 4.1.5 Measuring wave velocity, and 4.1.6 Calculating depth or distance from waves. Each one has a worked solution and a mark scheme showing where the marks go.