Newton's Laws

Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.

• The Law of Inertia
• The Law of Acceleration
• The Law of Conservation of Momentum

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When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?

• The cannon moving forward
• The cannonball moving forward
• The cannon moving backward
• The cannonball moving backward

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• 1st
• 2nd
• 3rd

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Isaac Newton stated for every action there is an

_________ and _________ reaction.

• equal and same

• equal and opposite

• unequal and same

• unequal and opposite

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What does the second part of Newton’s first law say about objects at rest?

• They cannot move unless they have a lot of friction.

• If they are heavy, they will stay at rest, but if they are light, they will move.

• They will stay at rest unless an outside force makes them move.

• They have more inertia than objects in motion.

Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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An inflated balloon released from rest moves horizontally.

The law that best explains this event is

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Law of Gravity

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A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

• For every action there is an equal and opposite reaction.
• Every mass exerts a force on every other mass.
• An object at rest tends to stay at rest.
• Friction opposes the motion of an object.

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A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

• The Law of Inertia
• The Law of Acceleration
• The Law of Conservation of Momentum

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