Question

A wave is traveling down a string at 15 m/s. A snapshot of the wave is shown in the figure below.

(a) What is the wave's amplitude?
cm
(b) What is the wave's wavelength?
m
(c) What is the wave's frequency?
Hz
(d) What is the wave's period?
s

Answer 1

(a) Amplitude=1.5 m

Amplitude is the maximum distance from the mean (zero disturbance) position.Here amplitude= 1.5 m

(b) wavelength= 2 m

Wavelength is the length of one complete wave or distance traveled by a wave in a time equal to Time Period. Here wavelength= 2 m

(c) Frequency=7.5 Hz

using equation for wave velocity V= f λ

15= f (2)

f=7.5 Hz

so frequency=7.5 Hz

(d) Time period= 0.133 s

Time period= T= 1/f

T= 1/7.5

T=0.133 s

so time period=0.133 s