Lever Systems Flashcards
What is an axis
An imaginary straight line around which a body for objects rotates
What is a fulcrum
The point around which a lever rotates
What is the load
The force applied by the lever. E.g a dumbbell being curled
What is the effort
A force that is applied by the user of the lever system. The effort is supplied by your muscles
What is a first class lever and give an example
Where the fulcrum is in the middle and the load and the effort are on different sides. Moving the hear up and down. Would be useful when heading a football
What is a second class lever and give an example
The heel joint where the fulcrum is at one side the load is in the middle and the effort is on the side. Used for a calf raise
What is mechanical advantage
Allows load to be moved with relatively small effort
