A single fixed pulley has a mechanical advantage of 1:1. Mechanical advantage, which is correlated to the usefulness of a machine, refers to the proportion of force output to force input. Force output refers to the force exerted by the machine, while force input refers to the applied force.Know More
Machines are devices that utilize mechanical or electrical power to perform a variety of functions. Mechanical machines are contraptions that increase work capacity and efficiency by providing added energy to carry out certain activities.
There are two classifications of mechanical machines: simple and compound. Simple machines are composed of a single mechanical apparatus. The six types of simple machines include the wheel and axle, simple lever, simple inclined plane, pulley, wedge and screw.
A pulley consists of a wheel having a corrugated rim with a length of rope, string, cord or chain running along the rim. This simple machine is typically used to hoist or lower down a load, particularly heavy objects.
The mechanical advantage of a pulley system is determined by the number of ropes hanging on the sides of all pulleys that are working against gravity. A single fixed pulley uses only one rope, where the load is lifted by the same distance as the other end of the rope is pulled down. In a 1:1 mechanical advantage, the applied force is the same regardless of the pulley being used.Learn more about Motion & Mechanics
A movable pulley is a pulley that can freely move. This is only one of three types, the other two being fixed and compound pulleys. Examples of movable pulleys are elevators.Full Answer >
A compound pulley, sometimes referred to as a block-and-tackle system, is a mechanical arrangement of pulleys that permits a trade-off of applied force for distance, according to HowStuffWorks. By slinging rope over and through a system of wheels, a compound pulley permits weights to be lifted and pulled with the application of relatively little force, saving energy and reducing the power needed to accomplish work.Full Answer >
The pulley is an effective mechanism that allows the user to lift or drag an object without overexerting. Making a simple pulley system requires just a few basic steps. To construct this system, you will need a basic pulley, screws or nails, a hammer or a drill and the item that will be inserted through the pulley. This item could be rope, wire or string, depending on the weight of the object being moved.Full Answer >
The seven simple machines are the inclined plane, wedge, screw, lever, pulley, gear and wheel and axis. The simple machines are non-powered mechanical devices that change the direction or magnitude of a force. Each of these machines is considered to be a simple machine. However, when combined, they are considered a complex machine.Full Answer >