If no net force acts on a body that is already in motion at a constant a. the velocity of the body is constant b. the body is accelerating c. the momentum of the body is zero d. the momentum of the body is increasing i think the answer is a, but double check and explain how you know! tysm!

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?