D. Calculate the time it takes for the block to slide up the inclined plane and reach v = 0 algebraically.
E. Calculate the time it takes for the block to slide down the inclined plane and reach the bottom, assuming it starts at the position you calculated in (D).
F. If the inclination of the plane is 15 and the coefficient of sliding friction μk=0.05, find the total time for the block to return to the point of projection.
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