Starting from rest, a 5.00 - kg block slides 2.50 m downa rough 30.0° incline. The coefficient of kinetic frictionbetween the block and the incline is μk = 0.436. Determine(a) the work done by the force of gravity, (b) the work done bythe friction force between block and incline, and (c) the workdone by the normal force. (d) Qualitatively, how would theanswers change if a shorter ramp at a steeper angle were usedto span the same vertical height?

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