you're driving home from the grocery store at 18 m/s with a 7.0 kg bag of groceries on the front seat when the light ahead turns red. what is the shortest distance in which you can stop, after the brakes are applied, without the groceries sliding off the seat? the static and kinetic coefficients of friction are, respectively, 0.65 and 0.45. assume that the surface of the seat is horizontal.