Kinematics: The mathematical description of motion without any reference to the cause. The cause of this motion will be described in a later tutorial.
Vector: A quantity that has magnitude, size, and direction. Velocity and displacement are examples.
Scalar: A quantity that has only magnitude, or size. Speed, distance, and time are examples.
The speed of an object at any particular instant.
Average velocity: The total distance traveled divided by the total time of travel.
Acceleration: The rate of change of velocity. Acceleration describes how fast an objects speed is changing per amount of time.
Kinematic Equations: Formulas that relate the variables of motion.
a = Δv/Δt=(vf-vi)/t
acceleration due to gravity = -9.8 m/s2
Free Fall: Motion where gravity is the only force acting on an object. Gravity will accelerate an object at -9.8 meters per second per second.