Simple Machines

Why do we use simple machines?

• To make work easier
• Because it is fun

To make an inclined plane easier to use, should the incline be gentle and gradual or go up quickly at a steep angle?

• Gentle and gradual
• Go up quickly at a steep angle

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NGSS.MS-ETS1-1

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To make the load easier to lift when you use a lever, where should the fulcrum be?

• Far away from the load
• Closer to the load
• Next to the lever arm

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What has to be present for “work” to be happening?

• Strong muscles
• A lot of effort
• Movement

A machine with few or no moving parts is called what?

• A compound machine
• A simple machine
• A complex machine

An inclined plane wrapped around a cylinder is called?

• Screw
• Wedge
• Lever
• Pulley

What is a compound machine?

• Complicated
• Hard to work
• Two or more simple machines that are combined.

A pair of scissors is made up of what simple machines?

• A lever and a wedge
• A wedge and a wheel and axle
• A pulley and a lever

What work does an inclined plane do?

• It is used to separate things.
• It moves things higher or lower.
• It is used to hold things together.

What work does a wedge do?

• It is used to raise and lower things.
• It spins around an axle.
• It is used to separate, lift, split, or hold.