7) An experimental rocket plane lands and skids on a dry lake bed. If it's traveling at 76.0 m/s when it touches down, how far does it slide before coming to rest? Assume the coefficient of kinetic friction between the skids and the lake bed is 0.590.
8) Find the initial acceleration of a rocket if the astronauts onboard experience six times their normal weight during an initial vertical ascent. (In this exercise, the scale force is replaced by the normal force.)
m/s2