Intro to Simple Machines

What is this?

• a screw 
• a wedge
• an inclined plane

What is this?

• a screw 
• a wedge
• an inclined plane

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What is this?

• a wedge
• an inclined plane
• a screw

A lever is a simple machine used to help________?

• hold two things together

• lift heavy objects

• push objects

• throw heavy objects

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A device that has two or more simple machines working together 

• fulcrum 
• pulley
• compound (complex) machine 
• motor 

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Which is not a type of simple machine?

• spring
• screw
• pulley
• wedge

The device used to raise a flag up a flag pole is an example of a

• wheel and axle

• lever

• inclined plane

• pulley

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Identify this simple machine

• Lever
• Wheel & Axle
• Inclined Plane
• Screw

A ____________ is a push or a pull on an object.

• friction

• force

• magnet

• gravity

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Why do engineers use simple machines?

• Engineers creatively use their knowledge of science and math to make our lives better, often using simple machines.

• They invent tools that make work easier.

• They accomplish huge tasks that could not be done without the mechanical advantage of simple machines.

• They design structures and tools to use our environmental resources better and more efficiently.

• All of the above

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