Physics Course/Motion/Periodic Motion/Wave

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Water Wave[edit]

Concentric Circles[edit]

Concentric circles travels in a direction when there is a cobble drops on the water surface

x^2 + y^2 = r^2
Tan \theta = \frac{y}{x}

Which can be expressed as

y(\theta) = r Sin \theta
x(\theta) = r Cos \theta


High Low Wave[edit]

Water wave moves in a direction that changes its amplitude sinusoidally

y(t) = r Sin \omega t
\omega = \frac{\lambda}{t} = \lambda f

With

\lambda : Wavelength . The distance between 2 crests (highest point)
f : Frequency . frequency of time to complete a cycle