1. KINEMATICS:
Episode I
How far did it go?
How fast did it travel?

2. Go Speedracer!! Go!! Part 1
Using metersticks and stopwatches, record the time it takes for the racecar to travel 3 meters.
Record the time at 30 cm intervals in a table containing both time and distance.

3. Distance (d): How far something travels in changing position (total)
EX. I live 5 miles from NPHS. Where do I live?
Scalar Quantity
A quantity that has magnitude (size) only. No direction.
Ex. Mass, time, temperature

4. Δt S = d OR AVERAGE SPEED (S) Def: The total distance traveled
Time to travel distance
S = d Δt OR
*Where the
bar means average
and Δ means change
*SCALAR quantity

5. British Engineering Standard: feet/second OR ft/s *miles/hour (mph)
SI UNITS:
meters/second OR m/s
*km/hr more common
British Engineering Standard:
feet/second OR ft/s
*miles/hour (mph)
more common
*quick convert: mph ≈ twice m/s
Conversion
1 m/s = 3.6 km/h = 2.24 mi/h
1 mph = km/hr = m/s

6. Instantaneous Speed
Speed at a specific
instant in time

7. Usain Bolt holds the record for the 100m dash at 9.58 seconds.
Find his average speed in : a.) m/s b.) km/hr c.) mph
100 m/9.58 sec = m/s
10.44 m/s X (7.2 km/hr) = km/hr
( 2 m/s )
10.44 m/s X (4.5 mph) = mph
(2 m/s)

8. Go Speedracer!! Go!! Part 2
Calculate the racecar’s average speed for each interval and the entire trip.
Use your data to plot a graph of the position of the car versus time.

9. Complete “Investigating Travel in the Halls of NPHS”
Average Speed Analysis table.
*Don’t use rounded numbers (the ones recorded in table)—use originals for each speed unit!