What must occur for an object to have a perfectly circular orbit A. An object must have the exact mass to orbit in a circle
B. An object must have the exact velocity to orbit in a circle
C. An object must have enough gravity to orbit in a circle
D. An object must have enough velocity to create an exit velocity

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?