Simple Machines

What is a simple machine?

• A device that has only one working motor

• A device that makes more work for a job

• A device that makes work easier

• A device that is made of two or more machines

Tags

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What is the equation for calculating work? 

• force plus distance

• force times distance

• mass times acceleration 

• work divided by time

Tags

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What are the units for work? 

• newtons

• force

• watts

• joules

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The rate of doing work equals the rate of using _____.

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How is power measured?

• Newtons

• joules

• watts

• currency

What are four ways that a simple machine makes work easier?

Answer explanation

1. Increase the force applied to the object

2. Change the direction of the force

3. Increase the distance or spread of the force

4. transfer force from one place to another

A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.

• wheel & axle

• wedge

• lever

• inclined plane

Draw an example of a pulley.

Answer explanation

Does your drawing look like this one?

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What type of simple machine is this?

• lever

• screw

• pulley

• wheel & axle

An inclined plane wrapped around a rod forms this simple machine

• lever

• screw

• wedge

• inclined plane