The student connects the thread to a mechanical oscillator. The oscillator is set in motion using a signal generator and this causes the mass–spring system to undergo forced oscillations.
A vertical ruler is set up alongside the mass–spring system as shown in Fig. 1.2. The student measures values of A, the amplitude of the oscillations of the mass as f, the frequency of the forcing oscillations, is varied.
Fig. 1.2
At the point X, where the mass–spring system is joined to the thread, the amplitude of the oscillations is 4 mm. When the mass–spring system resonates at its natural frequency, amplitude of oscillation is 95 mm.
On the axes provided, sketch the expected relationship between the amplitude and frequency of oscillation.
Fig. 1.3