
Equation for Average Velocity
<V> = ΔX/Δt

Difference between speed and velocity
 Velocity is a vector; it has a magnitude and direction
 Speed is does not have a direction
 Velocity is a measureĀ of displacement/time
 Speed is a measure of distance/time

Equation for acceleration
 a = ΔV/Δt
 *must be instantaneous velocity
 *constant velocity means zero acceleration

Relationship between position, velocity, and time for onedimentional motion
 x = x_{0}+v_{0}t+1/2at^{2}
 v^{2}v_{0}^{2} = 2aΔx
 v = v_{0}+at

Define acceleration, velocity, and deceleration
 Acceleration: How quickly the velocity changes
 Velocity: How quickly the position changes (net)
 Deceleration: Acceleration is in the opposite direction of velocity

If you throw a ball straight into the air...
How does acceleration apply?
How does velocity apply?
 Acceleration is g at EVERY POINT in the throw, even at the top.
 Velocity is equivalent at the same point (y) during the throw, but will have the opposite direction (opposite sign)
 Velocity at the top will be 0

