Forces & Motion Review

"Ball A" was dropped from a higher elevation.  Which of the following forces is responsible for it falling downward?

• magnetism
• gravity
• electricity
• friction

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"Ball C" is rolling across the surface, but it eventually comes to a stop. Which force is most likely responsible for this?

• gravity
• magnetism
• electricity
• friction

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If all of the above blocks are the same mass, which of the following would slide across the surface the fastest as a result of the forces acting on it?

• Block D
• Block B
• Block C
• Block A

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Which of the blocks shown above would not move when exposed to the forces above?

• Block B
• Block D
• Block C
• Block A

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In Scenario A, a ball is being pushed along by a large force. If the force were suddenly decreased (like in Scenario B), what would happen to the motion of the ball?

• it would speed up    
• it would remain the same
• It would slow down
• it would change direction

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What is a force?

• A push or pull that can change the motion of an object

• To reach a conclusion using evidence and reasoning

• The energy that an object has because it is moving

• The amount of matter that makes up an object

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How does friction affect the speed of an object?

• Speeds it up

• Slows it down

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Which of the following is the equation for Newton's second law of motion?

• F = m x a
• m = F x a
• a = m X F

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Newton's first law of motion states that a moving object, unless it is acted on by an unbalanced force, will

• remain in motion
• eventually come to a stop
• change its momentum
• accelerate

What must you know to find the momentum of an object?

• mass and acceleration
• acceleration and force
• mass and velocity
• velocity and tim

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