# Equation Confusion

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

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

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.

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

Isn't Period equal to:

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

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

frequence : 1/s
period : s

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