A ball of 8.5 kg is thrown upwards 16 meters. What is the gravitational potential energy gained by the ball? Estimate f to 9.81 and keep 4 significant figures.

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?