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  2. Torque - Wikipedia

    en.wikipedia.org/wiki/Torque

    In practice, the relationship between power and torque can be observed in bicycles: Bicycles are typically composed of two road wheels, front and rear gears (referred to as sprockets) meshing with a chain, and a derailleur mechanism if the bicycle's transmission system allows multiple gear ratios to be used (i.e. multi-speed bicycle), all of ...

  3. Prony brake - Wikipedia

    en.wikipedia.org/wiki/Prony_brake

    The torque is then related to the lever length, shaft diameter and measured force. The device is generally used over a range of engine speeds to obtain power and torque curves for the engine, since there is a non-linear relationship between torque and engine speed for most engine types. Power output in SI units may be calculated as follows:

  4. Couple (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Couple_(mechanics)

    The forces have a turning effect or moment called a torque about an axis which is normal (perpendicular) to the plane of the forces. The SI unit for the torque of the couple is newton metre. If the two forces are F and −F, then the magnitude of the torque is given by the following formula: = where

  5. Euler's equations (rigid body dynamics) - Wikipedia

    en.wikipedia.org/wiki/Euler's_equations_(rigid...

    Torque-free precessions are non-trivial solution for the situation where the torque on the right hand side is zero. When I is not constant in the external reference frame (i.e. the body is moving and its inertia tensor is not constantly diagonal) then I cannot be pulled through the derivative operator acting on L.

  6. Motor constants - Wikipedia

    en.wikipedia.org/wiki/Motor_constants

    The relationship between and is not intuitive, to the point that many people simply assert that torque and are not related at all. An analogy with a hypothetical linear motor can help to convince that it is true.

  7. Gear - Wikipedia

    en.wikipedia.org/wiki/Gear

    The gearbox lets the operator vary the torque that is applied to the wheels without changing the engine's speed. Gearboxes are used also in many other machines, such as lathes and conveyor belts. In all those cases, terms like "first gear", "high gear", and "reverse gear" refer to the overall torque ratios of different meshing configurations ...

  8. Electromagnetic clutches and brakes - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_clutches...

    When considering torque, the question of using dynamic or static torque for the application is key. For example, if a machine is running at a relatively low rpm (5–50 depending upon size) then dynamic torque is not a consideration since the static torque rating of the coupling will come closest to where the application is running.

  9. Screw theory - Wikipedia

    en.wikipedia.org/wiki/Screw_theory

    The force and torque vectors that arise in applying Newton's laws to a rigid body can be assembled into a screw called a wrench. A force has a point of application and a line of action, therefore it defines the Plücker coordinates of a line in space and has zero pitch. A torque, on the other hand, is a pure moment that is not bound to a line ...