Question

Problem 6.10 A 390 kg piano slides 2.7 m down a 24 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figu 1) gnore friction. Figure 1 of 1 Part A Determine the force exerted by the man. Express your answer to two significant figures and include the appropriate units. FP Value Units Submit My Answers give Up Part B Determine the work done on the piano by the man. Express your answer to two significant figures and include the appropriate units. HA Value Units Submit My Answers Give Up Part C Determine the work done on the piano by the force of gravity. Express your answer to two significant figures and include the appropriate units.

Answer 1

Please fiind the image

As there is no act Applying force equilibrium in x direction F = Mg sin theta F = (390) (9.8) (sin 24 degree) work done on piano by man w_m = (F) (distance travelled by piano) w_m = (F) (x) As F & x are in opp direction W_m = 4200 J work done by gravitational force on piano w = -w_m w = 4200 J New work done on piano = 0