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8 Cards in this Set
- Front
- Back
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momentum
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the force needed to change the motion of an object
mass * velocity unit is kg*m/s |
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law of conservation of momentum
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momentum is not lost or created, its just transfered between objects
pi1 + pi2 = pi1 + pi2 |
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projectiles
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anythin shot or thrown through the air
both horizontal & vertical horizontal velocity is constant vertical velocity is increasing due to gravity |
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4 forces of nature weakest to strongest
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-gravity
-weal force -electromagnetic force -strong force |
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gravity
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this force acts between all mass in the universe
infinite range always attractive |
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weak force
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causes beta decay
repulsive responsive for fueling stars short range |
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electromagnetic force
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this acts between electrically charged particles
chemicals reactions, electricity, magentism, and light are all produced by this force attractive or repulsive infinite range |
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strong force
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binds neutrons and protons together by the exchange of gluons between quarks in the cores of atoms
attractive very short range |
