Lesson 1: Describing Motion and Force - Darrell Bolin | Biblioteka

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To know if something is in motion you have to have a .

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An object is in if its position changes when compared to another object.

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A place or object used for comparison to determine if something is in motion is a .

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Motion is relative.

Tačno

Netačno

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A is a push or pull.

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The SI unit for the strength of a force is called a .

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is a contact force that two surfaces exert on each other when they rub against each other.

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Forces can be described as either or .

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is the force that pulls objects towards each other as a result of their masses.

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The three types of noncontact forces are ,, and .

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

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A net force acting on an object causes a change in the object's motion.