Physics - Friction and forces
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friction |
Friction is a force that slows things down when two things rub against each other.
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lubricant |
A lubricant is a substance (normally a liquid) used to reduce friction.
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resistance |
Air resistance is a force that tries to slow things that are moving through the air.
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density |
The density of an object is worked out by finding its mass and dividing by its volume.
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mass |
The mass is the amount of matter that something is made of.
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volume |
The volume is the amount of room something takes up.
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unbalanced |
Two forces working in opposite directions that are not the same strength are said to be unbalanced.
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stationary |
All stationary (still) objects have balanced forces on them.
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elastic |
Any substance that will return to its original shape and size after it has been stretched is said to be elastic.
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speed |
The speed of an object is how fast it is moving.
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* This sentence was added by a Spellzone user.
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