Pullys Flashcards
1
Q
What is a pully? (1)
A
One or more wheels with a rope looped over it, with a load at one end and effort at the other.
2
Q
What does a pully improve/ make easier? (1)
A
Lifting a load.
3
Q
Name 4 things about a 1 wheel pully (4)
A
- It lifts to the opposite direction.
- Must apply force equivalent to force creating.
- Have to pull 1 meter to lift 1 meter.
- It doesn’t alter the force.
4
Q
Name 2 things about a 2 wheel pully (2)
A
- You apply halve the force of what you creat.
- Pull 2 meter to lift 1 meter.
- Because it needs more rope.
5
Q
Tell me something about a 4 wheel pully (1)
A
- Apply a quarter of force
- Pull 4 meters to lift 1 meter.
6
Q
How is a pully like a lever (2)
A
- They increase force
- Bigger force by larger distance
- Give example
7
Q
Name 3 types of pullys and give an example of each. (6)
A
Fixed pully - rope over tree
Movable pully - Crain
Compound pully - bike gears
