The bullet would either hit or miss the target, depending on how good the aim of the first skydiver was. Since the shooter was in free fall, he would be pushed back and probably begin to rotate rapidly.
The shape of the displacement versus time graph for a skydiver would be a curve that starts at zero displacement when the skydiver jumps out of the plane, increases as the skydiver falls accelerating due to gravity, and eventually levels off as the skydiver reaches terminal velocity. The curve will then be a straight line at a constant displacement representing the terminal velocity until the skydiver opens the parachute, at which point the displacement will decrease as the skydiver slows down and lands.
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Nothing would happen.
A good pistol for a beginner would be a 22 cal. pistol. The ammo is cheap to purchase and this will allow you to get lots of practice without breaking the bank. A 357 Magnum is another good choice.
F = m A = (70) (9.8) = 686 newtons (154 pounds)Coincidentally, this is the same reading the skydiver sees when he steps on the bathroom scale.
Only if they have a heart attack, but not likely.
The acceleration of the skydiver can be calculated using Newton's second law: F = ma, where F is the force of gravity - air resistance, m is the mass of the skydiver, and a is the acceleration. The acceleration will depend on the exact value of air resistance acting on the skydiver.
The 9mm pistol would have the higher decibel rating.
Where do you come up with 62 miles? That's in excess of 300,000', pretty much outside the atmosphere. At that altitude the skydiver would exhilarate to well in excess of the speed of sound. The highest skydive was at 108,000'.
in danger
You will either live or die, depending on where you got shot. Usually, it ends in a lot of pain, and blood would be spattered everywhere around you.
It's pretty average. I would buy another pistol whenever possible, but if your stuck with it, don't worry.