Levers Flashcards
(25 cards)
What is the fulcrum in a lever?
A fixed point around witch the load rotates or pivots
What is the load in a lever?
The weight or resistance that the lever is attempting to move or lift
What is the effort in a lever?
The force applied by a muscle to move a load or resistance
Where is the fulcrum in a first class lever diagram?
In the centre of the diagram
Where is the effort in a first class lever diagram?
On the left side of the diagram
Where is the load on a first class lever diagram?
On the right
What way is the arrow pointing for the effort on a first class lever diagram?
Down
What way is the arrow for load pointing on a first class lever diagram?
Down
Where is the fulcrum in a second class lever diagram?
On the right
Where is the effort on a second class lever diagram?
Left
Where is the load in a second class lever diagram?
Centre
What way is the arrow for load pointing in a second class lever diagram?
Down
What way is the arrow for effort pointing in a second class lever diagram?
Up
Where is the fulcrum in a third class lever diagram?
Left
Where is the load in a third class lever diagram?
Right
Where is the effort in a third class lever diagram?
Centre
What way is the arrow for load pointing in a third class lever diagram?
Down
What way is the arrow for effort pointing in a third class lever diagram?
Up
What is mechanical advantage?
How much easier a lever system makes it to move a load with a give amount of effort
(Resistance arm is bigger)
What are the two different arms in lever systems?
Effort arm, resistance arm
What is the purpose of the effort arm in levers?
Influence mechanical advantage of the lever
What is the purpose of the resistance arm?
Bares the weight and the load
Name the classes of levers
First class levers
Second class levers
Third class levers
What does
EFL
ELF
FEL
Stand for?
1st class: Effort,fulcrum,load
2nd class: effort,load,fulcrum
3rd class: fulcrum,effort,load
