1. Includes references to PS#3-1 and 4-1
3. Describing Motion
Includes references to
PS#3-1 and 4-1

2. Picturing Motion Motion diagrams
Ticker Tape illustrating constant velocity
* * * * * * * * * * * * * * * * * *
Ticker Tape illustrating constant acceleration
* * * * * * * * * * *

3. Picturing Motion Motion Diagrams
Vectors illustrating constant velocity
Vectors illustrating constant acceleration
---> ---> ---> ---> ---> ---> ---> ---> ---> ---> ---> ---> --->
-> --> ---> ----> -----> > > > >

4. Speed, Distance, Time
Speed is a scalar quantity. A quantity that has only magnitude. (a number plus a unit)
For example: 10 mi/h, 12 km/h, 5 m/s
Average Speed: The ratio of the total distance divided by the time.
Average Speed = distance / time

5. Velocity, displacement, time
Velocity is a vector quantity. A quantity that has both magnitude and direction. (A number, a unit, and a direction)
For Example: 6.5 m/s, East
Average Velocity: The ratio of the change in position to the time interval during …
v(ave) = displacement / time
displacement = d(f) - d(i) OR d - d(o)

6. Acceleration, /\v, time
Acceleration is a vector quantity. A quantity that has both magnitude and direction
For Example: 12 mi/h/s, East and
+3 m/s/s which means 3 m/s/s forward
Average Acceleration: The change in average velocity divided by time
Acceleration = /\v / t
And /\v = v(f) - v(i) OR v - v(o)

7. What’s up with m/s/s?
A unit of acceleration is a change in velocity (I.e. m/s) divided by time (I.e. s)
When a fraction like m/s is divided a value like s, the rule says to invert and multiply
So a unit like m/s/s may be written as m/s^2, where the m/s is being divided by the second, and because of the invert and multiply rule for fractions its m/s^2

8. Working with PS#3-1 Let s represent speed, v(ave) may be used
1a-e, s = d / t
2a-e, d = s * t
3a-e, t = d / s
4a-e, v(ave) = d / /\t, bold type = vector
5a-e, /\t = d / v(ave)
6a-e, d = v(ave) * /\t

9. Working with PS#4-1 1a-e, a(ave) = /\v / /\t 2a-e, /\v = a(ave) * /\t
3a-e, /\t = /\v / a(ave)
4a-e, a(ave) = [v - v(o)] / /\t
5a-e, v = a * /\t + v(o)
6a-e, v(o) = v - a * /\t