when moving a couch you exert a force of 400 N and push it 4.0 how much wokr have you done on the couch

W = 1600 J

Explanation:

Given in the question,

force exerted = 400N

distance it covered = 4m

The general formula for work and for determining the amount of work that is done on an object is:

W = F * D * cos (Θ)

The SI unit for work is the joule (J)

Plug values in the formula

W = 400 (4) cos (0)

W = 400 (4) (1)

W = 1600 J