Torque arm: Torque arm refers to the perpendicular distance between the axis of rotation and where a force is applied, affecting the magnitude of torque.
Rotational equilibrium: Rotational equilibrium occurs when an object's net torque is zero, resulting in no rotational acceleration.
Lever arm: Lever arm represents the perpendicular distance between an axis of rotation and where a force is applied, influencing both torque and mechanical advantage.