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Example 3: Two UPS workers are unloading a truck full of 10 kg boxes One slides them down a ramp to the ground. The other picks packages up from the top of the ramp and walks them 3 m horizontally before setting them straight down onto the ground 1 m below (Bending her knees, not her back!). Find the work done by the force of gravity on a package for (a) sliding down the ramp and (b) being walked over to the bottom of the ramp. Force Diagram(s) Apply Work Equation(s): Example 4: A UPS worker pushes a 10 kg box 5 m from a package sorter over to the ramp leading up to a delivery truck across a rough surface (,-0.50, 0.25). Once the box is there, she realizes that it is damaged, and must be repaired, so she pushes the box back to the sorter over the same 5 m path. Find the work done by friction on the box for (a) the trip over to the ramp and (b) the total round trip. Force Diagram(s) Apply Work Equation(s):
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