Question

A wave along a string has the following equation $y = 0.05 \sin(28t - 2.0x)$ m (where $t$ is in seconds and $x$ is in meters). What are the amplitude, frequency and wavelength of the wave?

• A. amplitude $= 0.05$ m, frequency $= 4.456$ Hz and wavelength $= 3.518$ m
• B. amplitude $= 0.05$ m, frequency $= 28$ Hz and wavelength $= 2.0$ m
• C. amplitude $= 5.0$ m, frequency $= 4.456$ Hz and wavelength $= 3.518$ m
• D. amplitude $= 0.05$ m, frequency $= 2.0$ Hz and wavelength $= 28$ m
• E. amplitude $= 0.05$ m, frequency $= 3.456$ Hz and wavelength $= 4.518$

Hint:

The coefficient of $t$ is always $\omega$ and the coefficient of $x$ is always $k$[ 56]. Use these to jump straight into finding $f$ and $\lambda$

Answer 1

The Correct Option is A