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You push your couch a distance of 3.6 m across the living room floor with a...

You push your couch a distance of 3.6 m across the living room floor with a horizontal force of 202.0 N. The force of friction is 148.0 N. What is the work done by you, by the friction force, by gravity, and by the net force?

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Answer #1

distance = s = 3.6 m

applied force = F = 202 N

a) WORK DONE BY YOU = W = F S COS( THETA)

                                          W = FS COS(0) = 727.2 JOULES

b) work done by friction = - Ff * s = -148* 3.6 = -532.8 J

c) wg = 0 because force and displacements are perpendicular

d) wt = 727.2 -532.8 = 194.4 joules

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