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Work is done on a 40 pound baby by his mom as she holds him and walks up the stairs
true
false
idk
depends on how good you look with the cup
Duh...
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Answered by
GPT-5 mini
AI
True.
Reason: Work = force · displacement. The mom applies an upward contact force on the baby while the baby is displaced upward by the stairs, so she does positive work equal to roughly mgΔh (40 lb × vertical rise). (If she carried the baby horizontally with no vertical displacement, the weight would not be displaced and no net work would be done against gravity, even though the mom still expends metabolic energy.)
Reason: Work = force · displacement. The mom applies an upward contact force on the baby while the baby is displaced upward by the stairs, so she does positive work equal to roughly mgΔh (40 lb × vertical rise). (If she carried the baby horizontally with no vertical displacement, the weight would not be displaced and no net work would be done against gravity, even though the mom still expends metabolic energy.)
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