Mechanical Advantage Instructions

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Presentation transcript:

Mechanical Advantage Instructions Please use this Powerpoint and Pages 125-135 to gain an understanding of how mechanical advantage works and fill out the note sheet.

What is mechanical advantage? The number of times a machine multiplies the effort force.

Lever MA Formula Lever (any class) MA lever = distance from fulcrum to effort distance from fulcrum to resistance = Le Lr

Wheel and axle MA Formula MA w&a = radius of wheel = rw radius of axle ra

Pulleys MA Formula Fixed pulley: Always 1 (does not change the force, only direction) Moveable Pulley/Block and Tackle = the number of sections of rope that support the object **If the string goes up, count it **If the string goes down, don’t count it

Inclined Plane MA Formula MA inclined plane = length of incline = L height of incline h

Please try the calculations on the back of your Mechanical Advantage paper!