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A device for increasing (or decreasing) a force or simply changing the direction of a force

Simple Machine

Device thar makes work easier only one movement .... by changing the force exerted in size or the direction of both

Compound Machine

Devices that make work eaiser in more then one movement


Simple machine

Inclined Plane

Sloping surface to raise objects

Difference between rotation and revolution

rotational is on and internal axles while revolution is on an external axles

Rotational inertia

Spins on internal axles resistance of object to change its motion

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