Newton Review

Newton’s ______ can be used to explain events in the natural world, such as how a pencil falls to the floor and how planets revolve around the Sun.

• laws of motion

• theory of relativity

• principle of uncertainty

• law of thermodynamics

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In the absence of air, all objects fall at the same rate, because the force of Earth’s gravity causes objects to ______.

• accelerate

• float

• stop

• move sideways

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______ orbit Earth because of gravity. They travel very fast, but with each meter forward that they travel, they ______ just a tiny bit due to Earth’s gravity.

• satellites

• fall

• float

• rise

• hover

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Astronauts in Earth’s orbit experience ______ because they are in ______.

• weightlessness

• freefall

• gravity

• zero gravity

• floating

Without gravity, satellites would continue in a ______ away from Earth.

• straight line

• circular orbit

• spiral path

• zigzag trajectory

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Also, the ______ describes what happens in a collision. When two objects collide, the total ______ of the objects before the collision equals the total momentum of the objects after the collision.

• conservation of momentum

• momentum

• conservation of energy

• energy

• velocity

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• This is an example of Newton's First Law.
• This is an example of Newton's Second Law.
• This is an example of Newton's Third Law.

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• This is an example of Newton's First Law.
• This is an example of Newton's Second Law.
• This is an example of Newton's Third Law.

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• This is an example of Newton's First Law.
• This is an example of Newton's Second Law.
• This is an example of Newton's Third Law.

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• This is an example of Newton's First Law.
• This is an example of Newton's Second Law.
• This is an example of Newton's Third Law.

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