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Simple Machines


TYPES OF SIMPLE MACHINES

  • Lever (e.g. hammer, seesaw)
  • Inclined Plane (e.g. ramp, wedge)
  • Wheel and Axle (e.g. door knob)
  • Pulley (e.g. block and tackle)

TYPES OF LEVERS

Simple Machines

  • Lever - a rigid bar that can turn freely about a pivot or support called a fulcrum.
  • First Order Lever (EFL)
  • (e.g. scissors, pliers, hammer pulling out nail)

  • Second Order Lever (FLE)
  • (e.g. wheel barrow , bottle opener, nutcracker)

  • Third Order Lever (FEL)
  • (e.g. shovel, tongs, fishing rod)


TYPES OF PULLEYS

Simple Machines
Fixed Pulley


Simple Machines
Moveable Pulley


MECHANICAL ADVANTAGE

  • Mechanical Advantage of a Lever

MA = Load / Effort
MA = Effort Arm Length / Load Arm Length

  • Mechanical Advantage of an Inclined Plane

MA = Sloped Length of Ramp / Vertical Height of Ramp

  • Mechanical Advantage of a Wheel and Axle

MA = Wheel Diameter / Axle Diameter

  • Mechanical Advantage of a Pulley

MA = Number of ropes supporting the load