Physics Frequency

Question

Frequency = 1/period. A pendulum swings to and fro every 3.8 ss. Find its frequency of swing and the units.

Answer 1

Let's break this problem down.

A period is the interval of time it takes for a motion to repeat. In this case, the period is the time it takes the pendulum to swing back and forth once. So:

Period, P = 3.8 seconds.

As you noted, to calculate frequency we use:

Frequency, f = 1/P

or

1/3.8 = 0.2631

The units of frequency are in Hertz.

So the answer would be 0.2631 Hz