Which simple machine is a doorknob? a lever a screw a pulley a wheel and axle

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?

In what direction does an applied force move an object

In a series circuit the __ is the same at every point