Harmonic oscillations: body speed
$$v = v_{m}\cdot cos(\omega\cdot t+\frac{\pi}{2})$$
v - speed (velocity)
v_max - maximum speed
ω - angular (cyclic, radian) frequency
t - time
v_max - maximum speed
ω - angular (cyclic, radian) frequency
t - time
Find
It is known that:
= 