Q:

What is the mechanical advantage of a single fixed pulley?

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Quick Answer

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.

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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.

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Related Questions

  • Q:

    What are six types of simple machines?

    A:

    The six simple machines are the wheel and axle, lever, pulley, wedge, inclined plane and screw. Simple machines provide a mechanical advantage. This means less force is required to perform work on an object, and the force is exerted over a longer distance, according to TeachEngineering.

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  • Q:

    What is a combined pulley?

    A:

    A combined pulley is a type of pulley that has and uses movable and fixed pulleys simultaneously. In this system, many pulleys can be used at the same time with less weight needed to lift an object.

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  • Q:

    What is an example of a fixed pulley?

    A:

    A fixed pulley is stationary and doesn't move; it changes the direction of force to move an object. An example of a fixed pulley is the traditional water well where a fixed beam is suspended over the opening and the pulley is fixed to the beam to lower the bucket.

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  • Q:

    What are seven simple machines?

    A:

    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.

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