(a)[1]
Explain the meaning of the natural frequency of vibration of a system.
(b)
A metal block is attached to one end of a vertical spring. The other end of the spring is connected to an oscillator, as shown in Fig. 4.1. The oscillator has a constant amplitude of oscillation. Fig. 4.2 shows how the amplitude $x_0$ of the block’s oscillations varies with the frequency $f$ of the oscillations.
(b(i))[1]
Name the effect shown in Fig. 4.2.
(b(ii))[2]
State and explain whether the block is undergoing damped oscillations.
(c)[1]
State one example in which the effect shown in Fig. 4.2 is useful.