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"Machines"

Types of Machines Found in the Body

QuestionAnswer
Machines used to increase mechanical advantage
How many ways do machines function? 4
4 ways machines function -Balance forces, enhance force, enhance range of motion & speed, alter resulting direction of the applied force
3 Types of machines found in the body Levers (most common), Wheel-axles, Pulleys
Levers a rigid bar that turns about an axis of rotation or a fulcrum
Axis axis - point of rotation about which lever moves
Three points determine type of lever & for which kind of motion it is best suited -Axis (A)- fulcrum - the point of rotation -Point (F) of force application (usually muscle insertion)-Point (R) of resistance application (center of gravity of lever) or (location of an external resistance)
First class - FAR (teeter totter) - Balance(d)
Second class - ARF (Wheel Barrel) - power
Third class - AFR ( Baseball bat) - Speed
Created by: BAC
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