Forces and motion 5th

Besides a strength, or magnitude, what does every force have?

• gravity

• direction

• friction

• magnetism

What is a force?

• a push or pull
• speed or acceleration 
• potential or kinetic energy
• balanced or unbalanced force

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What is the force that causes everything to be pulled down to the Earth?

• friction
• gravity
• balanced
• unbalanced

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When an object is getting faster, it is called....

• potential energy
• kinetic energy
• acceleration
• deceleration 

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Inertia is....

• for every action, there is an equal and opposite reaction
• larger objects take more force to move 
• an object in motion tends to stay in motion unless acted on by an opposite force
• a push that acts in the opposite direction and it slows down.

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Friction helps objects to move easier.

• true
• false

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

• gravity
• friction
• electricity
• magnetism

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A ball is rolled across four different surfaces with the same force. Which surface will slow the movement of the ball the most?

• tile floor

• paved road

• grassy field

• cement sidewalk

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How do electric and magnetic forces act on different objects?

• They only pull objects

• They only push objects

• They both push and pull objects

• They only push or pull objects when they are touching

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What happens when an object accelerates?

• It can only be speeding up

• it can only be turning

• it can only be slowing down

• it can either be speeding up, slowing down, or changing directions

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