Force and Motion Vocabulary

Every action has an opposite, equal reaction.

• Newton's 1st law

• Newton's 2nd law

• Newton's 3rd law

• Fig Newton's law

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An objects resistance to change of speed or direction?

• speed

• inertia

• unbalanced force

• gravity

The force that one surface exerts on another surface when two objects rub against each other?

• friction

• gravity

• inertia

• balanced force

An object at rest will remain at rest unless acted upon by an unbalanced force. Likewise an object in motion will remain in motion unless acted upon by an unbalanced force.

• Newton's 2nd law

• Newton's 3rd law

• Fig Newton's law

• Newton's 1st law

Motion of an object depends on the objects mass and the net force applied to it.

• Newton's 3rd law

• Newton's 1st law

• Newton's 2nd law

• Fig Newton's law

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The rate at which an objects speeds up, slows down or changes direction.

• acceleration

• speed

• velocity

• momentum

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When two or more equal forces act upon an object, resulting in no motion.

• friction

• balanced force

• unbalanced force

• inertia

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When two or more unequal forces act upon an object, resulting in a change or in motion or direction.

• balanced force

• unbalanced force

• inertia

• friction

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That force that pulls objects towards each other.

• force

• friction

• gravity

• weight

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A push or pull that causes an object to move, stop, or change direction.

• force

• friction

• gravity

• weight

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