Period
The time duration required to complete one full cycle of a recurring motion or oscillation.
Governing formula
T = 1 / f = 2π / ω = 2π √(m/k)
SI unit
s
In depth
Period is the reciprocal of frequency. For a simple pendulum at small angles, T = 2π √(L/g), independent of bob mass.
Examples in the real world
A clock pendulum with a 2-second period taking 1 second to swing left and 1 second to return.