Torque and equilibrium review
|Torque ()||Measure of the twisting action caused by a force that can cause an object to rotate about an axis. Vector quantity with SI units of .|
|Net torque ()||Sum of all the torques on a system|
|Balanced system||When the net torque on a system is zero|
|Lever arm||Perpendicular distance from the axis of rotation to where the force is applied. Vector quantity with SI units of .|
|Pivot point||Point that an object rotates around. Sometimes called the fulcrum or rotational axis.|
|Equation||Symbol breakdown||Meaning in words|
|is torque, is applied force, is the radius from the axis of rotation to the location where the force is exerted, and is the angle between and when these vectors are placed tail to tail.||Torque is proportional to both the lever arm and the force component perpendicular to the lever arm.|
How to visualize the torque equation
The magnitude of the torque depends on:
- Applied force : Larger forces increase torque.
- Radius : Increasing the radius increases the torque.
- Angle between the force and lever arm : Directing a force perpendicular to the lever arm increases the torque.