A 380-kg piano slides 3.9 m down a 27 incline and iskept
Chapter 7, Problem 7.11(choose chapter or problem)
A 380-kg piano slides 3.9 m down a 27 incline and iskept from accelerating by a man who is pushing back on itparallel to the incline (Fig. 7-21). Determine: (a) the forceexerted by the man, (b) thework done by the man on thepiano, (c) the work done bythe force of gravity, and(d) the net work done onthe piano. Ignore friction.FIGURE 7-21 11.
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