Forces and Simple Machines

What is a force?

• a push or pull
• speed or acceleration 
• potential or kinetic energy
• balanced or unbalanced force

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When objects remain in the same place, it is called...

• gravity
• friction
• balanced force
• unbalanced force

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What is the force that causes everything to be pulled down to the Earth?

• friction
• gravity
• balanced
• unbalanced

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Force is measured in....

• Galileos 
• Newtons
• Di Vincis
• Einsteins 

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NGSS.MS-PS2-1

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Why is it harder for the boy in Image B to get down the hill?

• Motion
• Friction
• Work
• Displacement

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NGSS.MS-PS2-2

Students conducted an investigation in which they let the same car roll down the same ramp in three different locations in their school with three different floor types, as shown in the picture. Which of the following questions was this investigation most likely designed to answer?

• How does the mass of the toy car affect its speed?

• How does friction affect the distance a toy car rolls?

• What mechanical advantage does an inclined lane give?

• Why does gravity make a toy car roll down a ramp?

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What type of force is air resistance?

• Contact
• Non-contact

When two objects rub together, what force do they produce

• Gravity
• Air resistance
• Friction
• Water resistance

Which of these would you not find in a 'simple machine'?

• A lever

• A micochip

• A pulley

• A wheel and axle

What is Rube Goldberg famous for drawing lots of examples of?

• Simple machines
• Parachutes
• Boats
• Submarines

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