Simple machines

Definitions: Machine- A device that makes work easier by changing the speed , direction, or amount of a force. Simple Machine- A device that performs work with only one movement. Simple machines include lever, wheel and axle, inclined plane, screw, and wedge. Ideal Mechanical Advantage (IMA)- A machine in which work in equals work out; such a machine would be frictionless and a100% efficient IMA= De/Dr Actual Mechanical Advantage (AMA)- It is pretty …showed first 75 words of 585 total…

…showed last 75 words of 585 total…is never 100%. Added discussion         Believe it or not your arm is a simple machine. Your arm is a form of lever. The muscles and bones work together as levers. The two bones in your forearm act as the bar of the lever. Your elbow is the fulcrum of your lever. When you contract your biceps, this muscle exerts an effort force on the forearm bones to pull upward. the entire forearm is the resistance force.