Engineering, 15.03.2020 11:23 sarinawhitaker

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Identify the machines in your
school workshop that have
a pulley system as the drive
mechanism. What are the
advantages of using pulleys?
How can different speeds be
achieved?

Answers: 3

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To indentify the machines in our school that have a pulley system as the drive mechanism and the advantages of Pulley system is given below

Explanation:

1.A pulley is a wheel with a groove along its edge, that holds a rope or cable. ... When pulleys are used together in this way, they reduce the amount of force needed to lift a load. A crane uses pulleys to help it lift heavy loads. Pulleys are one of the six simple machines.

2.Examples of pulleys include:

Elevators use multiple pulleys in order to function. A cargo lift system that allows for items to be hoisted to higher floors is a pulley system. Wells use the pulley system to hoist the bucket out of the well. Many types of exercise equipment use pulleys in order to function.

3.Using multiple pulleys decreases the amount of force necessary to move an object by increasing the amount of rope used to raise the object. The mechanical advantage (MA) of a pulley system is equal to the number of ropes supporting the movable load.

4.To calculate the mechanical advantage of a pulley you simply have to count the number of rope sections that support whatever object you are lifting (not counting the rope that is attached to the effort). For example, in a one pulley system the MA is 1. ... Therefore your mechanical advantage would be 2 (600/300).

5.The movable pulley is used to reduce the amount of input force to lift a load. The most popular system that uses this pulley would be a well. Unlike the fixed pulley, the movable pulley is attached to the load, and is lifted by pulling up on the rope, making it twice as easier to lift a heavy object.

6.The main benefit of the pulley is that it can actually reduce the amount of force which is required to lift heavy objects and redistributes the direction of the force to lift heavy objects

Answer from: Quest

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.

Answer from: Quest

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