Machines. Simple Machines  Work out is less than or equal to Work in.  Force out can be greater than Force in.

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Presentation transcript:

Machines

Simple Machines  Work out is less than or equal to Work in.  Force out can be greater than Force in.

Mechanical Advantage MA = F in F out

Efficiency Eff = 100 x W out W in

Ideal Machines W in = W out F in d in = F out d out

Simple Machines There are three types of simple machines we will discuss in this class: Pulley Inclined Plane Lever

Pulley

Pulley Ideal MA

Inclined Plane An inclined plane is a ramp.

Work out for inclined plane W out = F out x Height Height

Work in for an inclined plane Length W in = F in x Length

Lever Fulcrum

Work in for lever Distance W in = F in x d in

Work out for lever Distance W out = F out x d out

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