a man bring to work a 5.7kg box of decorations. Being lazy and tired, when he reaches the ramp outsideof his office, he attaches a (massless) rope to the box and drags it up the incline.
a) if he pulls at the 22.62 degree angle and the coefficient of static friction between the box and the ramp is .42, what is th minimum force does he must apply in order to make the box slide?
b) after pulling long enough to get the box going 3.4 m/s, he lets go of the rope. If the coefficient of kinetic friction between the box and the ramp is .2, how long does it take the box to stop? Please be my lifesaver.