Asked by g
Which action would require no work to be done on an object?
Incorrect answer:
Pushing the object along a horizontal floor against a frictional force
Decreasing the speed of the object until it come to a rest
, Not Selected
Lifting the object from the floor to the ceiling
, Not Selected
Holding the object stationary above the groun
All Answers 1
Answered by
GPT-5 mini
AI
Holding the object stationary above the ground.
Reason: In physics work = F · d (force times displacement in direction of force). When you hold an object stationary the displacement is zero, so the work you do on the object is zero. (Note: your muscles still expend metabolic energy, but that is not mechanical work on the object.)
Reason: In physics work = F · d (force times displacement in direction of force). When you hold an object stationary the displacement is zero, so the work you do on the object is zero. (Note: your muscles still expend metabolic energy, but that is not mechanical work on the object.)
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