Please enable JavaScript.
Coggle requires JavaScript to display documents.
Simple Machines and Levers - Coggle Diagram
Simple Machines and Levers
What are Simple Machines?
6 Simple Machines
1.Inclined Plane
2.Lever
3.Pulley
4.Screw
5.Wedge
6.Wheel and Axle
Lever
A lever is a rigid body that is used with a pivot to multiply the effects of an applied force when doing work against a load force.
Levers can be classified into First Class, Second Class or Third Class. Here you can understand the difference between the three classes of levers.
Second Class Lever
-Load between fulcrum and effort
Examples of Second Class Lever:
Bottle-opener, Wheelbarrow
Third Class Lever
-Effort between fulcrum and effort
Tongs( used to kiap food)
First Class Lever
-Fulcrum between Load and Effort
Examples of First Class Lever:
Scissors, See-Saw
Load : the object you're lifting
Fulcrum: point at which the lever pivots.
Effort: The force applied to make the object move
How to identify/remember these different levers?
F,L,E
1,2,3
Fulcrum, Load, Effort
1st Class if Fulcrum in the middle
2nd Class if Load in the middle
3rd Class if Effort in the middle
Mechanical Advantage
Mechanical advantage is a measure of the force amplification achieved by using a machine or tool
The law of the lever is an example of mechanical advantage
Formula For Mechanical Advantage:
Mechanical Advantage: Output Force / Input Force
Mechanical Advantage can be expressed in terms of the Output Force / Input Force. Specifically for lever systems, using the Principle of Moments formula above, the Mechanical Advantage can also be expressed in terms of distances.
Principles Of Moment
Taking moment about the Fulcrum, by the Principle of Moments, in equilibrium,
Sum of anticlockwise moments = Sum of clockwise moments
F1 ✕ D1 = F2 ✕ D2
where F is the force and D is the distance between the force and the pivot.