Mechanisms: Levers
Definition
Extra words
Fulcrum: Object or pivot on witch a elevator is acticved.
A lever is a rigid bar that is used with a point of support or a fulcrum.
The lever is balanced when the effort (F), multiplicated by its distance (d) is equal to the load (R) multiplicated by its distance from the fulcrum (r) Equation: F x d = R x r
balanced: in a state of equilibrium
Types of levers: Definition
Photos
They are classifed according to the possition of the load and the effort applied in relation to the fulcrum They are class 1, class 2 and class 3
Types of Levers: Types
Class 1: The load and the effort are on opossite sides on the fulcrum. The effect of effort can be multiplicated or reduced
Class 2: The load is between the effort and the fulcrum. The effect of the effort is always multiplicated.
Class 3: The load is between the fulcrum and the load. The effect of the effort is always reduced.
Class 1
Class 2
Class 3