# 2. The iron sights on a rifle are adjusted for elevation based on the amount the...

2. The iron sights on a rifle are adjusted for elevation based on the amount the bullet will drop with distance. A rifle fires a 8 gram 7.62x39 bullet from a horizontal bench. The bench rest is elevated 1,4 from the ground. The bullet is observed to strike the ground at a distance of 1.2 km from the firing location. What was the muzzle velocity of the bullet? b. At what angle does the bullet hit the ground? c. If the gun barrel is.8 m long and the explosive force of the gun powder on the bullet is constant over the length of the barrel, what is the average force the gun powder exerts on the bullet while it is in the barrel? d. (extra) If the radius of the earth is 6353 km, how fast would the bullet have to travel to never hit the ground?

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