PHYSICAL QUANTITY

Amplitude: formulas and units of measurement

Amplitude: symbol A, xₘ, unit m. Formulas and explanations for Oscillations and waves.

A,\ x_mA, xₘ\text{м}meter

KEY CONNECTIONS

Formulas

x=x_m\cos(\omega t)x = xₘ cos(ωt)

q=q_m\cos(\omega t)q = qₘ cos(ωt)

i=I_m\cos(\omega t)i = Iₘ cos(ωt)

v_m=x_m\omegavₘ = xₘω

a_m=x_m\omega^2aₘ = xₘω²

I_m=q_m\omegaIₘ = qₘω

NOTATION

x: Displacement is the vector of change in body position relative to the starting point.
x_m: The displacement amplitude is the largest deviation in absolute value from the equilibrium position.
\omega: Cyclic frequency is the rate of change in the phase of oscillation.
t: Time is a quantity characterizing the duration and sequence of events.
q: Electric charge is a quantity that determines the participation of a body in electrical interaction.
q_m: Charge amplitude is the largest absolute charge value during oscillations.
i: Current strength is the charge passing through the cross section of a conductor per unit time.
I_m: Current amplitude is the largest absolute value of the current during oscillations.
v_m: Maximum speed - the highest speed value during oscillations.
a_m: Maximum acceleration - the highest acceleration value during oscillations.

THEORY

PRACTICE