PHYSICS 1403
Lab Homework – Projectile Motion
Data from a projectile motion experiment is shown below. There are three trials. Each trial had a
different launch angle. Calculate the launch speed for each trial and use that value to calculate the
Mean Launch Speed. Also calculate the standard deviation. Record your results in the cell in the
lower right-hand corner of the table. Show a sample (one) calculation for the launch speed and the
calculation for the standard deviation. (Sample calculation 5 pts each; each blank in table 1 pt; 34 pts
total)
Trial
Range 1 (m) Launch Angle
1
1.3
20°
2
2.4
30°
3
2.6
45°
Mean Launch Speed ± Std. Dev
Launch Speed
4.5 m/s
5.2 m/s
5.0 m/s
Mean = 4.9
Standard deviation: 0.36