A mover lifts a 50 lbm box off the ground and places it on a truck (Figure

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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?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

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