Simple Machines EGTECH12 Stu Egli Associate Professor Engineering Technology.

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Presentation transcript:

Simple Machines EGTECH12 Stu Egli Associate Professor Engineering Technology

LEVER Effort (E) is the input force which must be supplied by the user or an engine of some kind. Load (R) is the output force which is also the force resisting motion

LEVER EQUATIONS

LEVER CLASSES 1 st Class 2nd Class 3 rd Class

Wheel & Axle TORQUE = FORCE * RADIUS CIRCUMFERENCE = 2  (RADIUS) =  (DIAMETER)

Pulleys Mechanical Advantage = Total number of strands supporting the load (Note: Count the end strand only when the effort is pointed upwards. For Example – for the diagram shown above the Mechanical Advantage is 6.)

3 Types of Pulleys Fixed PulleyMovable PulleyBlock and Tackle M A=1MA=2MA=3

Inclined Plane

The Wedge

The Screw Circumference = 2  (RADIUS) =  (DIAMETER)