counterweight n : an equivalent counterbalancing weight [syn: counterbalance, counterpoise, balance, equalizer, equaliser] v : constitute a counterweight or counterbalance to [syn: counterpoise, counterpose]

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A counterweight is an equivalent counterbalancing weight that balances a load.

A counterweight is often used in traction lifts (elevators), cranes and funfair rides. In these applications, the expected load multiplied by the distance that load will be spaced from the central support (called the "tipping point") must be equal to the counterweight's mass times its distance from the tipping point in order to prevent over-balancing either side. This distance times mass is called the load moment.

Trebuchet: There are five major components of a trebuchet: beam, counterweight, frame, guide chute, and sling. After the counterweight drops from a platform on the frame, gravity pulls the counterweight and pivots the beam. Without the counterweight, the beam could not complete the arc that allows the sling to accurately release the projectile.

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