pulleys
What is a name for a pulley that has a fixed pulley and a movable pulley?
compound pulley
When you pull down what is making the object go up?
Your downward force (the work being done).
Does a steering system in a car have a pulley or a gear?
gear (rack and pinion)
Do gears have teeth?
Yes.
Name something around your house with a gear.
Bike, can opener, guitar etc.
What is the moveable pulley attached to?
What do pulleys do?
Help lift heavy things, or things that are far away.
What are the 2 types pulleys?
a moveable pulley and a fixed pulley
Which gear is faster the small or the big gear?
smaller gear
What is a name for a gear which has more than two or more gears?
gear train.
Is it easier to lift a load with a fixed single pulley or a compound pulley?
Compound Pulley
What is the machine in tall buildings that uses a compound pulley?
Elevator
Name two types of gears.
Spur gears, Rack and Pinion, Bevel gears, Worm gears,
How many types of gears have we learned about? Can you name them?
4: Spur, bevel, worm, rack and pinion.
What is it called when two gears are connected?
Meshed
What are the compound pulleys advantages?
you can lift things easier
What has a huge pulley system used on construction sites.
A crane.
How do bicycle gears work when they never actually touch each other (not meshed).
The chain connects them.
If a small gear moves a full turn and a bigger gear makes half a turn, how much bigger is that big gear?
The bigger gear will be twice as big. (twice as many teeth).
Example: In a gear train, a small gear is making a larger gear turn. Will the larger gear turn faster or slower?
slower.
What are pulleys made for?
To lift things
Two gears are meshed. Gear 1 has 20 teeth and gear 2 has 10 teeth. Which gear will spin faster? By how much?
Gear 2 will spin faster. It will be twice as fast.
worm gear
If there are 3 gears and the first one goes left which one will the third one go?
left
In a gear train, a larger gear makes a smaller gear turn. With the smaller gear turn faster or slower?
faster.