Levers Flashcards
How many classes of levers are there?
3
What are the main classes?
first class second class third class
What are the names of the symbols:
rod
fulcrum
direction of effort
direction of load
What do first class levers depend on?
where the 3 components are placed
Where are the components placed in words? (first class levers)
effort-fulcrum-load
Give two examples of first class levers:
seesaw
pliers
Do first class levers always have M.A
no
What is affected by the fulcrum?
whether or not the lever has M.A
When is the M.A greater?
when fulcrum is closer to load
What is in the middle in third class levers?
load
In which class are most tools?
second class
What is one big difference between 1 & 2nd class levers?
2nd class levers always have M.A
What are 2 2nd class levers?
nutcracker
What is the order of components in 2nd class levers?
effort-load-fulcrum
What is in the middle of the third class levers?
effort
