Physics Frequency

Question

A weight suspended from a spring is seen to bob up and down over a distance of 18 cmcm twice each second.What is its frequency? What is its period? What is the amplitude?

Answer 1

frequency is the number of cycles per second. It looks like you have 2 cycles in 1 second so the frequency is 2/1 Hz = 2 Hz

The period is 1/freq or 1/2 second.

The amplitude is 9 cm (+9 to -9 is a total of 18 cm)