Simple Machines

Two examples of a pulley...

• knife & axe blade
• lightbulb & screw
• flagpole hoist & window blinds
• catapult & teeter totter

Which of the following does a simple machine do?

• allows the users to apply less force over a longer distance
• reduce the amount of force needed to do work
• change the direction of the applied force
• all of the above

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field
• a banker counts money
• a mother pushes a stroller up a ramp
• a girl eats a sandwich

What do you call a machine made up of two or more simple machines?

• complicated machine
• compound or complex machine
• comprehensive machine
• constructive machine

An inclined plane wrapped around a rod forms this simple machine 

• lever
• pulley
• screw
• wedge 

A simple machine that consists a rigid bar that pivot about a fixed point

• lever
• pulley
• wheel and axle
• fulcrum 

A seesaw is an example of a  

• wedge
• lever 
• inclined plane 
• pulley 

Stairs

• wedge
• pulley
• inclined plane
• wheel and axle

Lightbulb

• wedge
• pulley
• incline plane
• screw

What type of simple machine is this?

• wheel and axle
• gear
• lever
• inclined plane