Nigative Hiv After 35 Days

Se trata de una rueda , generalmente maciza y acanalada en su borde, que, con el concurso de una cuerda o cable que se hace pasar por el canal, se usa como elemento de transmisión para cambiar la dirección del movimiento en máquinas y mecanismos. Además, formando conjuntos — aparejos o polipastos — sirve para reducir la magnitud de la fuerza necesaria para mover un peso, variando speed. Simple Pulley

Fixed
The easiest way is to use an anchor pulley on a stand, hang a weight at one end of the rope, and pull the other end to lift the weight. This configuration is called a simple pulley fixed .

A simple fixed pulley does not produce a mechanical advantage: the power to be applied is the same that would have been required to lift the object without the pulley. Pulley, however, can apply force in a more convenient. Examples:

P olea Simple Mobile
An alternative way to use the pulley to the load is secure, attach one end of the rope to support and pull the other end to lift the pulley and the load. This configuration is called "simple pulley mobile."
mobile
simple pulley produces a mechanical advantage: the force required to lift the load is just half the force would have been required to lift the load without the pulley. By contrast, the length of the rope to be pulled is twice the distance you want to go to the load.