Cart/Track/Rough Patch/Spring m h k 7 1 point How fast is the cart moving at the bottom of the curved portion of the track? Type your answer... d A small cart of mass 2.0 kg slides down from rest from the top of a frictionless curved track of unknown length, but whose height is h = 2.5 m. It first passes a 4.4 m patch of rough surface, then is stopped by a stiff spring. The coefficient of kinetic friction between the cart and the rough patch is 0.15, and the spring constant of the spring is 450 N/m 8 1 point How fast is the cart moving after the rough patch? Type your answer... 9 1 point How much is the spring compressed when the cart comes to a complete stop? Type your answer...