There is an analogous equation for rotary motion. We have T = J*Θ where “T” is the torque applied to some object having a moment of inertia “J” which experiences a rotary acceleration called “Θ” which ...

Technically, if you have point masses, then the moment of inertia would be: This equation says – take each mass. Multiply the mass by the distance to the axis squared and add up all these terms.