PASCO ME-6810 Time of Flight Accessory - Manual (Page 12)

Time of Flight Accessory Model No. ME-6810
12 ®
4. Connect the Time-of-Flight Accessory to the computer interface
using the extender cable.
5. Run the timing program and set it to measure the time between the
three successive signals (two Photogates and the timer plate of the
Time-of-Flight Accessory).
Procedure:
1. Put the plastic ball into the Projectile Launcher and cock it.
2. Test fire the ball to determine where to place the timer plate on the
floor. Put the timer plate on the floor where the ball hit.
3. Tape a piece of white paper and a piece of carbon paper to the plate
to record where the ball lands.
4. Shoot the ball and record the times between Photogates in Table
2.1.
5. Shoot the ball 9 more times to determine the average horizontal
distance traveled.
6. Use the Plumb Bob to find the place on the floor directly below the
muzzle of the launcher. Measure the horizontal distance along the
floor to the leading edge of the paper on the plate. Record this
distance in Table 2.1.
7. Remove the carbon paper and measure from the leading edge of the
paper to each of the dots on the paper. Record in Table 2.1.
Analysis:
1. Find the average of the ten distances and record in Table 2.1.
2. Add the distance to the leading edge of the paper to the average and
record in Table 2.2.
3. Calculate the time of flight by adding the time between photogates 1 and
2 and the time between photogate 2 and the timer plate. Record in Table
2.2.
4. Calculate the initial velocity using the time between photogates 1 and 2
and the distance between the photogates (10 cm). Record in Table 2.2.
5. Calculate the horizontal distance using the time, initial velocity, and angle
and record in Table 2.2.
6. Calculate the percent difference between the measured distance and the
calculated distance. Record in Table 2.2.