The figure shows four situations in which a force acts on a box while the box slides rightward a distance d across a frictionless floor. the magnitudes of the forces are identical; their orientations are as shown. Rank the situations according to the work done on the box during the displacement, from most positive to most negative.

  1. WA> WB> WC> WD
  2. WD> WC> WB> WA
  3. WD> WC> WA> WB
  4. WB> WD> WA> WC