(Note: shown car does not have pen tubes mounted on the side but rather on top of the car.)
Now for the Track:
attach angle iron onto both ends of the 2X4. attach by drilling holes in base of angle iron and screwing into place (see Photo)
Now drill holes into angle iron so wire can be ran on both sides of the track....
Wire should be about one inch apart so wire can be fed through tubes on car
Feed each wire through each individual pen tube so car will roll on the 2X4 while running on the guide wires
(note: wires must be pulled tight)
Now you can launch the car. We used the verner Logger Pro system to measure our cars Velocity
(Note: Distance for data is per one meter)
time to go:
one meter: .860109 sec.
two meters: .922248 sec.
Average speed: .8911785 sec per meter or 1.122109656 meters per second
Instantaneous Speed: your kidding right.
The average speed/velocity from the 1st photogate to the 3rd photogate was: 0.2958492 m/s
The average speed/velocity from the 3rd photogate to the 4th photogate was: 1.247256 m/s
The average speed/velocity from the 1st photogate to the 4th photogate was: 0.4764332 m/s
The acceleration from the 1st photogate to the 4th photogate was: 4.5331097 m/s^2
unfortunately, we were not able to obtain all five meters worth of data because of problems with the Verner system