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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