Part 1 science test work and machines

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8 Terms

1
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Work

When force causes an object to move in the direction of the force

2
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Power

How fast work is being done

3
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Force

The push or pull on an object

4
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Machine

A device that makes work easier

Ex. Chopsticks

5
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Work input

Work done on the machine, called the input force (ex. Opening and closing the scissors)

6
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Work output

Work done by the machine called the output force ( ex. The movement of scissors and cutting of the paper)

7
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mechanical advantage

Measure of the force achieved by using a machine

8
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mechanical efficiency

A machine has a higher mechanical efficiency if it takes a smaller work input to get a greater output.