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Scalar

a quantity that has magnitude only

vector

a quantity that has BOTH magnitude and direction

Distance

The total length of a path an object travels. (how far you go)
--Scalar

Displacement

The change in position of an object described by a vector that begins at the initial position and ends at its final position. (how far you go in a specific direction)
--Vector

Particle Model of Motion

A simplified version of a motion diagram in which the object in motion is replaced by a single point.

Speed

the distance an object moves in a given time.
--Scalar

Velocity

the displacement an object moves in a given period of time.
--Vector

Velocity Formula

v-bar=d/t
d=displacement
t=time
v-bar=average of v-final and v-initial

Acceleration

The rate at which velocity changes.

Free Fall

The ideal falling motion of an object in which the gravitational force is the only force acting on the object.

Acceleration due to gravity on Earth

The change in velocity in a given period of time as an object falls freely toward the earth.

g = 9.8 m/s2

Acceleration Formula

a=Δv/t

Distance Formula

d = vit + ½ at2

Final Velocity

vf2 = vi2 + 2ad

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