SPS8d

How do machines reduce the amount of force it takes to move and object?

• They cancel the distance over which the force is applied.

• They decrease the distance over which the force is applied.

• They increase the distance over which the force is applied.

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A ramp.

• Lever
• Inclined Plane
• Wedge
• Screw

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What type of simple machine is shown here?

• Pulley
• Wheel and Axle
• Lever
• Wedge

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Force is measured in...

• Kilograms
• m/s
• Newtons
• Joules 

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A push or a pull applied to an object

• Work
• Force
• Newtons
• Joules

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NGSS.HS-PS2-1

Which person is doing more work?

• Left 
• Right 
• Both
• Neither; they are doing the same amount of work.

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Which person uses the greatest force on the barrel?

• Right
• Left
• Both
• Neither; they are doing the same amount of work.

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Which person moves the barrel a greater distance?

• Left 
• Right 
• Both 
• Neither, they are doing the same amount of work.  

What is effort (input) force?

• the force one exerts on a machine

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

What is resistance (output) force?

• the force required by a machine in order to accomplish work (the force you put on the machine)

• The force that is exerted by a machine

• the force the machine exerts on a object

• the output work times the input distance