A soldier is responsible for measuring the muzzle velocity of a new rifle. Knowing the principles of the movement of projectiles, he decides to carry out a simple experiment in the indoor shooting range. The soldier hooks a target at a distance d = 104 m from the end of the barrel. The rifle is mounted so that the bullet exits horizontally at the same height as the target. After 6 attempts, the soldier totals the values he has measured for the distance, h, from the firing target. What is the most accurate muzzle velocity the soldier can report to his sergeant?
I would just average the values of h:
H = 40.23cm / 6 = 6.705cm
then use H = ½at²
0.06705m = ½ * 9.8m/s² * t²
t = 1.17 sec
V = d / t = 104 m / 1.17 s = 88.9 m/s
Alternatively, you could calculate all 6 speeds and then average them – but I think you’ll get a different answer.
I hope this helps you!
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