In which position does the ball have the least potential energy but the most kinetic energy

If the speed of a particle triples ,by what factor does its kinetic energy increase?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

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?