5) You are a gymnast of mass 72 kg, initially hanging at rest from a bar. You let go of the bar and fall vertically 92 cm to the floor below. Upon landing, you bend your knees, bringing yourself to rest over a distance of 35 cm. The floor exerts a constant force on your body as you slow down. Determine (a) your speed at impact, and (b) the magnitude of the force the floor exerts on you as you slow down