5.9. A man pushes on a piano with mass 180 kg; it slides at constant velocity down a ramp that is inclined at 19.0° above the horizontal floor. Neglect any friction acting on the piano. Calculate the magnitude of the force applied by the man if he pushes (a) parallel to the incline and (b) parallel to the floor.

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Deanna HettingerLv2

23 Sep 2018

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A 380-kg piano slides 2.9 m down a 25^o incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36) Determine: (a) the force exerted by the man, (b) the work done on the piano by the man, (c) the work done on the piano by the force of gravity, and (d) the net work done on the piano. Ignore friction.

greylocust991

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