A mover lifts a 50 lbm box off the ground and places it on a truck (Figure 1-21). If the floor of the truck is 4 feet off the ground, how much work was required to lift the box?

Transcribed Image Text:

↑ 4 ft 50 lbs Thermo-Movers OO FIGURE 1-21 A 50 lb_box is lifted off the ground and placed on the flatbed of a truck.