Lesson2 Force and Motion

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6 Terms

1
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What is a force?

A force is a push or pull that can make an object move, stop, or change direction.

Measured in Newtons (N).

2
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What is gravity?

Gravity is the force that pulls objects toward Earth.

3
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What is friction?

Friction is the force that resists motion between two surfaces in contact.

4
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What is Newton's First Law?

Newton's First Law (Inertia) states that an object at rest stays at rest, and

an object in motion stays in motion unless acted upon by an external force.

5
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What is Newton's Second Law?

Newton's Second Law states that Force = Mass Ă— Acceleration (F = ma).

More force is needed to move heavier objects.

6
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What is Newton's Third Law?

Newton's Third Law states that for every action, there is an equal and opposite reaction.