pulleys
What is a name for a pulley that has 2 or more pulleys?
compound pulley
When you pull down what is making the object go up?
Your downward force (the work being done).
Does a curtain blind have a pulley or a gear?
pulley
Do gears have teeth?
Yes.
Name something around your house with a gear.
Bike, car, clock...
What is the name of a pulley that has a wheel that can move?
Moveable pulley
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 inserted between two other gears?
idler
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, Bevel gears, Worm gears, idler gears, crown gears
How many types of gears have we learned about? Can you name them?
4: Spur, bevel, crown, idler, worm
What is it called when two gears are connected an an angle?
Bevel gear
Name 3 examples of something that uses a pulley.
Answers vary.
What has a huge pulley system used on construction sites.
A crane.
Name the gear with teeth that are at a right angle to a wheel.
crown gear
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 is the definition of a pulley?
Two gears are meshed. Gear 1 has 20 teeth and gear 2 has 10 teeth. Which gear will spin faster?
Gear 2 will spin faster.
Where is the input on a bicycle?
The pedals
If there are 3 gears and the first one goes left which one will the third one go?
left
Gears are used to change what 3 things?
speed, direction, torque