The force that opposes motion between two objects that are touching.

• magnetism

• gravitation

• a machine

• friction

______ is a push or pull of an object.

• machine
• power
• speed
• force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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Which surface will produce the most friction?

• wet surface
• rough surface
• smooth surface

What force causes rain drops to slide down a window?

• friction
• force
• magnetism
• gravity

If you pull on the following objects with the same amount of force, on which object will you have the least effect? 

• marker
• desk
• pencil
• chair

Tags

NGSS.MS-PS2-2

What is the unit for measuring force?

• newtons
• kilometers
• inches
• miles

Speed equals distance divided by time. What is the speed of a car that travels 120 miles in 2 hours?

• 40 miles per hour
• 60 miles per hour
• 12.5 miles per hour
• 100 miles per hour

Newton's Third Law states that for every action there is an equal, but opposite, reaction. 

• True
• False

Tags

NGSS.MS-PS2-1

What is the opposite action of you pushing down on your chair?

• The chair pushing up on you.
• The floor pushing on the chair. 
• You pushing down on the chair. 
• Your mass changing. 

Tags

NGSS.MS-PS2-2

Which of the following would be the hardest to stop?

• A loaded moving van traveling at 75 miles per hour
• A loaded, 100-car freight train traveling at 75 miles an hour
• A snowmobile traveling at 75 miles an hour
• Your family car traveling at 75 miles an hour

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

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