A box of mass 7.5 kg has an initial velocity of vi down an inclined planed that is at an angle of 17° above the horizontal. If the coefficient of kinetic friction between the box and the ramp is 0.13, (1) Find the acceleration of the box as it goes down the ramp.  (2) Find the work done on the box by gravity as the box moves 10 cm down the inclined plane.

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