A weather balloon is floating at a constant height above the earth when it releases a pack of instruments. (a) If the pack hits the ground with a velocity of –73.5 m/s, how long did it take for the pack to hit the ground? a 7.45 s
b - 7.45 s
c 3.75 s
d -3.75 s

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?