MACHINES

6 SIMPLE MACHINES

• Wheel and axle
• Lever
• Pulley
• Screw
• Inclined plane
• Wedge

WHAT IS A SIMPLE MACHINE?

• A SIMPLE MACHINE IS A DEVICE THAT CHANGES THE DIRECTION AND MAGNITUDE OF A FORCE.

WEDGE FAMILY

• Wedge
• Incline plane
• Screw

LEVER FAMILY

• Lever
• Pulley
• Wheel and axle

RESULTS

• My incline plane efficiency average was 266%
• My movable pulley efficiency average was 161%
• My third class lever efficiency average was 77%
• My incline plane had the highest efficiency because I had to pull it up a steep incline plain.

MECHANICAL ADVANTAGE RESULTS

• My average for my mechanical advantage in the incline plane is 2.6
• My mechanical advantage average in the movable pulley is 1.6
• My mechanical advantage average in my third class lever was 0.59
• My biggest average for mechanical advantage is the incline plane because again it's the steepest. The scale had to use the most work.

LEVER

• A lever is a simple machine that makes work easier by by moving a load around using a pivot force.
• Ex: light switch.

PULLEY

• A lever is a wheel on an axle that is designed to support movement and change of direction of a taut cable or belt
• Ex: elevator

WHEEL AND AXLE

• The wheel and axle is a wheel attached to a smaller axle so that these two parts rotate together then a force is transferred from one to the other.
• Ex: Tire

INCLINE PLANE

• An incline plane is a flat supporting surface tilted at an angle, with one end higher than the other, used for lifting or lowering a load.
• Ex: going up a hill.

SCREW

• A screw is simply an inclined plane around a cylinder.
• Ex: screw

WEDGE

• A wedge is simply a triangular tool, often made of metal, wood, stone or plastic.
• Ex: axe and knife.

THE END