Mechanical Advantage of the 6 Simple Machines. Content Objectives SWBAT calculate mechanical advantage for the six simple machines. Language Objectives.

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Presentation transcript:

Mechanical Advantage of the 6 Simple Machines

Content Objectives SWBAT calculate mechanical advantage for the six simple machines. Language Objectives SW explain what the mechanical advantage numbers indicate.

MECHANICAL ADVANTAGE Def.: Number of times a machine increases a force exerted on it. Sent.: The mechanical advantage of a machine without friction is called the ideal mechanical advantage, or IMA. Sp.: ventaja mecánica

Mechanical Advantage = Output force ÷ Input force

If the machine increases force then the mechanical advantage will be greater than 1.

If the machine increases distance then the mechanical advantage will be less than 1.

If the machine changes the direction then the mechanical advantage will be 1.

Inclined plane MA = Length of incline ÷ Height of ramp

Wedge MA = Length of wedge ÷ width of wedge

Screw MA = Length around the threads ÷ length of the screw

Lever MA = distance from fulcrum to input force ÷ distance from fulcrum to output force

Wheel & Axle MA = radius of the wheel ÷ radius of axle

Pulley MA = the number of supporting ropes

Calculate the MA of the tools we have used You should have information for the inclined plane in your journals. I will give you some of the tools to calculate its MA.