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FS Machines II: Levers

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by

Greta Riffle

on 13 November 2013

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Transcript of FS Machines II: Levers

Formula
1st Class
Machines II - Levers
Basics
Lever Parts
Fulcrum
Definition
Advantage
Mechanical Advantage
Definition
Effort
Effort Arm
Load Arm
- board or rigid object that
pivots around a fulcrum
- transfers applied force over a distance ->
exerts output force on an object
- pure simple machine
b/c friction is not a factor
- move a heavy object using less force than the weight of the object
Classes
- board or rod that can pivot around a point
distance from force to fulcrum
applied force that results in moving an object
distance from load to fulcrum
2nd Class
3rd Class
Factor by which a lever changes the force,
distance and speed, or direction of work.
Formula
Law of the Lever
Definition
The work
INPUT
to a lever equals the work
OUTPUT
by the lever
Work = Force x Distance
Work IN = Work OUT
Force of Effort x Distance to Effort = Force of Load x Distance to Load
MA = Length of Effort Arm
Length of Resistance Arm
MA = Length of Effort Arm
Length of Resistance Arm
Effects
MA > 1
MA = 1
MA < 1
Effects
MA = Load
Effort
Full transcript