Mark and David are loading identical cement blocks onto David’s pickup truck. Mark lifts his block straight up from the ground to the truck, whereas David slides his block up a ramp containing frictionless rollers. Which statement is true about the work done on the block–Earth system?

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Mark and David are loading identical cement blocks onto David&#8217;s pickup truck. Mark lifts his block straight up from the ground to the truck, whereas David slides his block up a ramp containing frictionless rollers. Which statement is true about the work done on the block–Earth system?(a) Mark does more work than David.
, (b) Mark and David do the same amount of work.
, (c) David does more work than Mark.
, (d) None of those statements is necessarily true because the angle of the incline is unknown.
, (e) None of those statements is necessarily true because the mass of one block is not given.
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Jason · Accepted Answer

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