What is the force exerted by a solid surface that opposes gravity?

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?

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

When using the scientist method, which step comes last?