In 4 s, the pendulum makes 8 oscillations. Oscillation frequency?

Given:

t = 4 seconds – time interval;

n = 8 – the number of oscillations that the pendulum makes during the time interval t.

It is required to determine v (Hertz) – the vibration frequency.

Let us determine the period of oscillation of the pendulum:

t = T * n, from here we find that:

T = t / n;

T = 4/8 = 0.5 seconds.

Then, in order to determine the frequency of oscillation of the pendulum, it is necessary to use the following formula:

v = 1 / T;

v = 1 / 0.5 = 2 Hertz.

Answer: the oscillation frequency of the pendulum is 2 Hz.