SIMPLE MACHINES

A BENCH

• Inclined plane
• To make it longer and less steeper

A RAILING

• Inclined plane
• To decrease height and make longer

A FAN

• Fan
• Wedge
• Make the wedge thinner

THE LOCK ON A DOOR

• Wedge
• Make the wedge thinner

A SCREW

• Screw
• Make threads closer together

PLIERS

• 1st class Lever
• Increase the distance from the output force to the input force

WHEELBARROW

• 2nd class lever
• Same as the first class lever

BASEBALL BAT

• Third class lever
• Same as the first class lever

DOLLY

• Wheel and axle
• Increase the radius of the wheel and decrease the radius of the axle

DOOR KNOB

• Wheel and axle
• Increase the wheels radius and decrease the axles radius

TRACTOR BRAKES

• Gear
• Increase the amount of teeth