This formula makes robots move and dance
Most students can write down:
T = Iα
But what does it actually mean?
In this video I break down how torque is directly linked to rotational inertia and angular acceleration — the rotational version of F = ma.
Torque (T) → the turning effect
Inertia (I) → resistance to rotation
Angular acceleration (α) → how quickly rotational speed changes
If the inertia increases, you need more torque.
If you want faster angular acceleration, you need more torque.
It’s not just a formula — it explains how engines, flywheels, turbines and gear systems actually behave.
If you’re studying mechanical principles, engineering, or physics…
this is one equation you must understand, not just memorise.
3/3 Edited to