Pulleys and Gears | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 25 Public

Pulleys and gears

Study Slideshow

What is a pulley?

A grooved wheel, with a rope, chain or belt that passes around it.

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What is the benefit of a fixed pulley?

It changes the direction of the effort force - you pull down which is easier

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What is the disadvantage of a fixed pulley?

The effort force is the same - it doesn't decrease the effort force.

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What is the benefit of a movable pulley?

It makes lifting the load easier - it uses half of the effort force

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What is the disadvantage of a movable pulley?

You have to pull up

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What is a combined or compound pulley?

It is a combination of fixed and movable pulleys

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What are the benefits of a combined pulley?

it changes the direction of the effort force (you pull down) AND it reduces the effort force

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What are the disadvantages of a combined pulley?

none

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What units are used to measure force?

Newtons (N)

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What force is caused by objects rubbing together?

friction

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What is the purpose of a pulley?

To make work easier.

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What material is makes the best pulleys and gears? Give 2 reasons why.

Metal - smooth, strong, durable, reduces friction, lasts long, doesn't break

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Name 5 things we see in our lives that use pulleys

clothesline, blinds, flagpoles, cranes, old water wells, window washers

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What is a gear?

A wheel with teeth around it that interlocks with the teeth of other gears

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What are spur gears?

Gears that meet on a flat or horizontal surface

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What are bevel gears?

Gears that meet at an angle

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