A checked torque and inertia produce angular acceleration. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Angular acceleration is torque divided by inertia

A torque of 12 newton meters acting on inertia 6 gives angular acceleration 2 per second squared.

α=12/6=2 per second squared\alpha=12/6=2\ \mathrm{per\ second\ squared}
Angular accelerationTorque divided by inertia sets alpha.r=3 mF=4 Nr=1 mr=3 mF=4 Ntau=12 N*mm=6 kgr=1 mI=6 kg*m^2alpha=2 1/s^2

The alpha claim cites its inputs

The alpha ledger stores 2 typed source references: torque and inertia.

2 checked sources2\ \text{checked sources}
Angular accelerationTorque divided by inertia sets alpha.r=3 mF=4 Nr=1 mr=3 mF=4 Ntau=12 N*mm=6 kgr=1 mI=6 kg*m^2alpha=2 1/s^2