1. Pulleys

2. Definition
A pulley is a grooved wheel with a rope, chain, or cable running along the groove.

3. Fixed Pulleys A fixed pulley is similar to a 1st class lever!
The wheel is the fulcrum and the rope on both sides is the effort and resistance!
A fixed pulley is attached to something that doesn’t move, like the ceiling or wall
Ex: Elevator
Fixed pulleys do NOT increase force. They only change direction. Small IMA!

4. Fixed Pulleys

5. Movable Pulleys
A movable pulley is one in which one end of the rope is fixed and the wheel is free to move.
Movable pulleys DO increase force and therefore can have a large MA!

6. Movable Pulleys

7. Block and Tackle Pulleys
Block and tackle pulleys are a combination of fixed and movable pulleys.
They can have a large MA!

8. Block and Tackle Pulleys