The work done by a force  , that displays an object through a distance  d  is defined as  . this can also be expressed as  . alexa is pushing a construction barrel up a ramp 4 feet long into the back of a truck. she is using a force of 120 pounds in a horizontal direction and the ramp is 45  from the horizontal. how much work is alexa doing? a. 228 ft-lb c. 312 ft-lb b. 286 ft-lb d. 339 ft-lb