Forces, friction and gravity basics

What is the combination of all forces acting on an object called?

• unbalanced force

• balanced force

• net force

• all the forces

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 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

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What direction does friction act relative to motion?

• in the same direction
• in the opposite direction 
• need more information
• depends on the force

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Sally experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

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Wheels on a skateboard most likely experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

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What is defined as a push or pull?

• force

• motion

• vector

• speed

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Swimming fish experience-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

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How will this object move? 

• It won't move. 
• It will move to the right. 
• It will move to the left. 
• It will move in both directions. 

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What is the net force?

• 30 N left
• 25 N right
• 5 N left
• 55 N right

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What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

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