What is a pulley?
A grooved wheel, with a rope, chain or belt that passes around it.
What is the benefit of a fixed pulley?
It changes the direction of the effort force - you pull down which is easier
What is the benefit of a movable pulley?
It makes lifting the load easier - it uses half of the effort force
What is the purpose of a pulley?
To make work easier.
Name 3 things we see in our lives that use pulleys
clothesline, blinds, flagpoles, cranes, old water wells, window washers
What is this?
dock crane
What is this?
lever
What is a pulley?
a kind of lever
What are on this ship?
Shipping containers
What is this?
circuit
Is the light on or off?
Off
Is a red wire positive or negative?
Positive
