What is the pulley tool?
The pulley tool is a simple machine that allows the worker to change the direction of the applied forces and possibly manage weights that far exceeds what can normally maneuver. There are three different types of pulleys: fixed, movable and folded. The fixed pulley is used to change the direction of the applied force, only while the other two change the direction and increase of the power force.
Regardless of the purpose of the pulley tool, the design is generally very similar. In its most basic is the pulley is a wheel, axle and a rope or strap. The axle is connected to a larger machine or secured on site using a stationary object. The bike is able to spin freely on the axle and the rope or strap sits against the bike. Most of the pulleys have grooves in the wheel, so the rope or strap does not slip when the lateral force is applied during use. The pulley changes the direction of the applied force around the wheel. The rope goes to the system at one angle, but another one. The difference between the two directions is the degree of change provided by the tool. For example, if a personIt pulls to the rope that passes through the pulley, the force on the rope is down, but the effect is transformed to rise after covering over the wheel.
The second, but probably even more important, is the use of the pulley tool to multiply the mechanical advantage. With some pulleys, the strength applied to the rope at one end in multiplication when moving through the system. The pulley with the mechanical advantage of a person does not provide any other advantage; The advantage of two evaluations, three trio, etc. For example, when the pulleys are applied to £ 100 (220 kg) forces with a three -mechanical advantage, the other end of the rope pulls with £ 300 (660 kg) power.
different types of tools is a combination of common pulp properties. The fixed pulley tool has the advantage of one and is used only when changing the direction, for example, for the car belts. These pulleys have axle that cannot move from one fixed position.
two more types of pulleys tools canto move and change their orientation based on the direction of applied force and provide a mechanical advantage. The movable pulley is as basic as a fixed pulley different from the freedom of its remedy to move. These pulleys provide a mechanical advantage of two. The compound pulley, also called block and tackle, is the only line that moves through more than one movable pulley. Each other pulley provides a slightly less mechanical advantage than the one in front of it, so the final value is variable, but this style always gives an advantage of greater than two.