Forces and Friction

What is a force?

• the PUSH or PULL on an object 

• The MOTION an object creates

• The objects HITTING one another

• Going REALLY FAST

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force?

• 17 N Right

• 3 N Right

• 3 N Left

• 17 N Left

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NGSS.MS-PS2-2

What is the unit for FORCE? (Choose 2)

• N (Newtons)

• lbs (pounds)

• g (grams)

• m/s (meters per second)

Which one is balanced?

• top

• bottom

• both

Is it BALANCED? 

• Yes

• No

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NGSS.MS-PS2-2

Which direction will the object move?

• Up

• Down

• Right

• Left

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NGSS.MS-PS2-2

If there are two forces going in the SAME direction, you would ...?

• (-) Subtract the forces

• (+) Add the forces

• Neither

• (x) Multiply

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NGSS.MS-PS2-2

Weight is a force that depends on mass and:

• friction

• gravity

• magnetism

• energy conservation

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NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which is the best description for the force vector drawn above?

• +3 cm

• +3 N

• -3 cm

• -3 N

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following forces is a contact force?

• Gravity

• Friction

• Magnetism

• Electricity