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1

Position

The location of something, (x, y, etcâ€¦)

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2

initial position

The position of where an object starts; x_{i}

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3

final position

the position where the same object ends up; x_{f}

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4

distance (d)

total length of the path taken by an object; never negative

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5

displacement

change in (total) position with the direction of change;

Î”x = x_{f}- x_{i} (direction)

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6

speed

How fast an object travels

Never negative

SI units = m/s

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7

Instantaneous speed

How fast an object is going at a specific moment in time

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8

Average speed

how fast, on average, an object moves during a moment in time

V

_{average }= d_{total}/ t_{total }

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9

Constant Speed

When the speed of an object is always the same/unchanging

v = d / t

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10

Velocity

Speed + Direction; How fast somethign is traveling and what direction it is traveling

Uses DISPLACEMENT

Not distance

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11

Acceleration

How quickly an objectâ€™s velocity is changing; Acceleration = a

SI units = (m/s) / s = m/s^{2}

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12

Constant Acceleration (EQUATIONS)

v

_{f}= v_{i}+ atd = Â˝ (v

_{i}+ v_{t}) td = v

_{i}t + Â˝ at^{2}v

_{f}^{2}= v_{i}^{2}+ 2ad

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13

freefall

When the only force on a (falling) object is gravity; air resistance is ignored

A= 9.8 m/s^{2}

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