# Equation Confusion

Air
I've come across a equation and I don't understand whether $T$ is Time/s or Tension/N. Can someone explain this equation:

$T = 2 \pi \sqrt{\frac{l}{g}}$

silver-rose
That would be the equation for the simple harmonic motion of a hanging mass on a pendulum.

T denotes the period of oscillation,
l the length of the string on which the mass hangs.

Notice that the period doesn't depend on how "wide" the mass swings.

Volcano
it is time. In fact period. Put the units for them and calculute the final result.

l : m/s
g: m/s^2

(m/s) / (m/s^2) : s

Air
Isn't Period equal to:

$P = \frac{1}{T}$

So to calculate time of oscillation, $T$ would need to be made subject.

Volcano
frequence : 1/s
period : s

$P = \frac{1}{T}$
So to calculate time of oscillation, $T$ would need to be made subject.