Levers Flashcards
(13 cards)
What is the ‘load’ in a lever system?
The weight or resistance that the lever is trying to move.
What is the ‘effort’ in a lever system?
The force applied to move the load using the lever.
What is the ‘fulcrum’ in a lever system?
The fixed pivot point around which the lever rotates.
Describe a first-class lever.
The fulcrum is between the effort and the load.
Give an example of a first-class lever.
A seesaw or a crowbar.
Describe a second-class lever.
The load is between the effort and the fulcrum.
Give an example of a second-class lever.
A wheelbarrow or a nutcracker.
Describe a third-class lever.
The effort is between the load and the fulcrum.
Give an example of a third-class lever.
A pair of tongs or a fishing rod.
How do you draw a first-class lever diagram?
Show the fulcrum in the middle, with effort on one side and load on the other.
How do you draw a second-class lever diagram?
Place the fulcrum at one end, load in the middle, and effort at the other end.
How do you draw a third-class lever diagram?
Show the fulcrum at one end, effort in the middle, and load at the opposite end.
Why is it important to understand the classes of levers?
To select the right lever type based on force direction and mechanical advantage needed.
