A car, mass 1225 kg, traveling at 35.0 m/s slows to a stop in 53 m. What is the magnitude and direction of the force that acted on the car? What provided the force?

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?