PLTW POE Simple Machines Part 1

Which simple machine is NOT found in the object?

• lever
• wedge
• wheel and axle
• inclined plane

What kind of simple machine?

• lever
• wheel and axle
• inclined plane
• screw

What are the units of force called?

• newtons
• joules
• work
• meters

If simple machines reduce the force needed to move an object, what trade-off must be made?

• increase the amount of work
• decrease the amount of work
• increase the distance the force is applied
• decrease the distance the force is applied

The boy can lift the barrel or roll the barrel up the inclined plane.  In which does he do more work?

• when lifting the barrel
• when rolling the barrel
• neither- both are the same amount
• neither- no work is done

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

• wedge
• screw
• lever
• inclined plane 

Which is a screw?

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Which is a first class lever?

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• 

Which is a third class lever?

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What simple machine does this image BEST represent?

• A lever

• A screw

• A wheel and axle

• A pulley