For ten points, name this quantity in rotational motion, the analogue of force, often given by the cross product of the lever arm with the force.
This pseudovector is the reason it is easier to open a door using a handle farther from the hinges, and its value depends on the angle between two certain quantities. This can be expressed as the time-derivative of angular momentum, or under certain conditions as the product of moment of inertia and angular acceleration. Its units are distinguished from joules for conceptual purposes, though they are dimensionally the same: newton-meters. For ten points, name this quantity in rotational motion, the analogue of force, often given by the cross product of the lever arm with the force.
This pseudovector is the reason it is easier to open a door using a handle farther from the hinges, and its value depends on the angle between two certain quantities.
{torque} [accept {couple} or {moment}]