Forces and Motion Review

What is air resistance?

• friction in the air that slows things down
• when an airplane flies into a cloud
• when you feel the air hitting your face

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Why do we need friction?

• It helps objects go faster. 
• It helps objects go up higher.
• It helps make objects go slower or stop.

What does a curved line on a distance-time graph show?

• That the speed is changing. 
• That the object is not moving. 
• That the object is constant. 

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What are EQUAL forces acting on an object in opposite directions that do not change the object's motion?

• Friction
• Weight
• Balanced Forces
• Unbalanced Forces

If an object does not move at all, what does that mean about the forces acting on the object? 

• The forces are balanced. 
• The forces are unbalanced. 

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Ted was rolling a pencil on his desk and the pencil fell down to the ground. What force made this occur?

• Magnetism
• Gravity
• Friction

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Look at the image. What two forces are happening in this picture? 

• Friction & Magnetism
• Magnetism & Gravity
• Friction & Gravity

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What does this graph represent?

• Constant speed
• Acceleration
• Not moving

Tags

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It's field day and two classes are playing tug-of-war. One side has 4 people and the other side has 8 people. What is this an example of?

• balanced forces
• unbalanced forces

Tags

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This is an example of _____ because the object WILL move. 

• Unbalanced Forces
• Balanced Forces
• Neither

Tags

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