8 N to the left , and 4 N to the right. Find the net force. Is this balanced 

• 12 N Right  No
• 4 N Left  No
• 12 N Right  Yes
• 4 N Left  Yes

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NGSS.MS-PS2-2

If there are two forces going in the same direction how would you find the net force?

• Subtract
• Add
• Neither
• Multiply

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NGSS.MS-PS2-2

What is force?

• A push exerted on an object
• A push or pull exerted on an object
• A pull exerted on an object
• Nothing

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NGSS.MS-PS2-2

The force that pulls things toward earth.

• Speed
• Gravity

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NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which one is balanced?

• top
• bottom
• both

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What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

What is the standard unit force is measured in?

• N
• lbs
• g
• m/s

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What is Sliding Friction?

• Opposes submarines in the water and airplanes in the air
• Opposes the dirrection of an 0bject as it slides over a surface
• None of the above
• Change in shape the point of rolling contrast because of friction

How many types of frictions are there?

• 2
• 4
• 10
• 6

Define Inertia

• How fast an object travels
• A push or pull
• An objects resistance to a change in its motion
• A force that brings a body towards to center of mass of an object