A student decides to shift a box of books into her dormitory room by pull on a rope joined to the box. She pulls with a force of 144 N at an angle of 29.0° over the horizontal. The box consists of a mass of 21.0 kg, and the coefficient of kinetic friction among box and floor is 0.300.
(i) Determine the acceleration of the box.
(ii) The student now begins moving the box up a 10.0° incline, keeping her 144 N force directed at 29.0° above the line of the incline. When the coefficient of friction is unaffected, determine the new acceleration of the box?