The force applied to a lever, multiplied by the distance from the lever's fulcrum, multiplied again by the sine of the angle created, is described as torque. This is also known as "r cross f," or "force times fulcrum distance times sine theta."
The equation for torque is:
where F is the force vector and r is the vector from the axis of rotation to the point where the force is acting.
- "Horsepower and Torque" An article showing how power, torque, and gearing affect a vehicle's performance.
- a discussion of torque and angular momentum in an online textbook
- Torque and Angular Momentum in Circular Motion on Project PHYSNET.
- An interactive simulation of torque