p, u3, topic 1: gravity and motion
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4 Terms
1
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scalar quantities
MDE
mag: quantities with only a magnitude
direction: can increase and decrease, but have no direction
e.g. distance, speed
2
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vector quantities
QEA
quantities with a mag and direction
e.g. displacement, velocity
angle: can be described using an angle
3
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speed definition
the rate of change of distance with time
= magnitude of velocity (but only if the path is straight, meaning that direction is constant)
4
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velocity definition
the rate of change of displacement with time
Note 
Flashcards (55)