Physics #1 Practice

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

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The tendency of an object to resist changes in its motion is...

• inertia
• force
• acceleration
• velocity

"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Force = Mass x Acceleration

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

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A Newton is a unit of...

• force
• inertia
• acceleration
• velocity

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The combination of all the forces acting on an object is the...

• net force
• action force
• reaction force
• balance force

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Which best explains why we are able to accelerate forward when starting to run?

• As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.
• No acceleration takes place. Runners are always at a fixed velocity.
• The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
• The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward

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When a large truck pushes a small car with a given force, the small car is applying an equal and opposite force on the truck.

• True
• False

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A description of the speed and direction of an object's motion is...

• Velocity
• Speed
• Acceleration
• Vector

A measurement of how fast an object is moving is called?

• Velocity
• Speed
• Vector
• Acceleration

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