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

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What tool is used to measure the effort force in a pulley system?

Spring scale

What force is caused by objects rubbing together?

friction

What is the benefit of a movable pulley?

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

If the first gear has 8 teeth and the second gear 16 teeth, how many times does the smaller gear turn for every 1 turn the larger gear rotates?

twice (2 times)

What are spur gears?

Gears that meet on a flat or horizontal surface

True/False: Gear beside each other in a gear train move in the same direction

False - gears move in the opposite direction

If the first gear in a gear train is turning clockwise, what direction is the second gear?

counter clockwise

What units are used to measure force?

Newtons (N)

What are the disadvantages of a combined pulley?

none

If there are 10 gears in a gear train and the first gear is turning counter clockwise, tell me 2 things you know about the other gears

all the odd numbered gears are turning clockwise, the even numbered gears are turning counter clockwise

What is a worm gear?

Gears in which an axle or shaft has a screw thread that connects with another gear

What is a gear train?

A group of two or more gears working together

What can gears do? (What is their purpose?)

They can change the speed and direction of motion. Also - they make work easier

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

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

What is the benefit of a fixed pulley?

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

Name 5 things we see in our lives that use pulleys

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

What is the purpose of a pulley?

To make work easier.

What is a rack and pinion?

A gear system in which a single gear meets with a toothed rack

What is a pulley?

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

What is the disadvantage of a fixed pulley?

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

What are bevel gears?

Gears that meet at an angle

What is the disadvantage of a movable pulley?

You have to pull up

What is a gear?

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

What is a combined or compound pulley?

It is a combination of fixed and movable pulleys

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