A counterweight is an equivalent counterbalancing weight that balances a load. One is often used in traction lifts (elevators), cranes, and funfair rides. A set of elevators or lifts, in the lower level of a train station. ... This article is about the transportation device. ... A tower crane with a pivoted main boom Cranes on the Shenska River, Cherepovets, Russia A crane is a tower or derrick equipped with cables and pulleys that is used to lift and lower materials. ... A travelling funfair has many attractions, run by different showmen, who all converge for the duration of the fair, then go their separate ways to set up at fairs in other towns. ...

Image File history File links Simple_Crane_diagram. ...

If the counterweight were not there, the load would tend to tip the crane forwards [clockwise]. The counterweight, which is usually made of a dense material such as concrete or lead, provides an anticlockwise moment that balances the load on the crane. Placing a concrete floor for a commercial building. ... This article is about the chemical element. ... Moment of inertia (SI unit kilogram metre squared kg m2) quantifies the rotational inertia of an object, i. ...

What's more: When the load is lifted, the counterweight is lowered by gravity. This reduces the amount of work that must be performed. Gravity is a force of attraction that acts between bodies that have mass. ... Work (abbreviated W) is the energy transferred by a force to a moving object. ...

A counterweight is also used in many rotating systems to reduce vibrations due to imbalances in the rotating assembly. A typical example is counterweights on crankshafts in piston engines. Crankshaft, pistons, and flywheel Continental engine marine crankshafts, 1942 For the comic strip about an old, curmudgeonly bus driver, see Crankshaft (comic strip). ... Components of a typical, four stroke cycle, DOHC piston engine. ...

In traction (non-hydraulic) elevators, a heavy counterweight counterbalances the load of the elevator car, so the motor only has to lift the difference between the car load and the counterweight load. This article is about the transportation device. ... A motor is a device that converts energy into mechanical power, and is often synonymous with engine. ...