. At point A, a box is sliding at 11.2 m/s. At point B the box's speed is now 7.11 m/s. B "a l':ll_2 III-"IS h 3.1-111 12.5kg __, A a) Determine the amount of thermal energy produced while the box is sliding up the slope. b) Determine the distance between point A and B. The force of friction on the box while sliding up the slope is a constant 18.3 N