Alex and John are loading identical cabinets ontoa truck. Alex lifts his cabinet

Chapter 7, Problem 1

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Alex and John are loading identical cabinets ontoa truck. Alex lifts his cabinet straight up from theground to the bed of the truck, whereas John slideshis cabinet up a rough ramp to the truck. Which statementis correct about the work done on the cabinetEarth system? (a) Alex and John do the same amountof work. (b) Alex does more work than John. (c) Johndoes more work than Alex. (d) None of those statements is necessarily true because the force of frictionis unknown. (e) None of those statements is necessarilytrue because the angle of the incline is unknown.

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