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Author Question: John is carrying a shovelful of snow. The center of mass of the 3.00 kg of snow he is holding is ... (Read 160 times)

anjilletteb

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on: Aug 6, 2020
John is carrying a shovelful of snow. The center of mass of the 3.00 kg of snow he is holding is 15.0 cm from the end of the shovel. He is pushing down on the opposite end of the shovel with one hand and holding it up 30.0 cm from that end with his other hand. Ignore the mass of the shovel. Sarah says that his hand pushing down on the shovel must be exerting a greater force than the hand pushing up. James says it is just the reverse. Which one, if either, is correct?

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Sarah, because the hand pushing down must exert a greater force to match the torque exerted by the snow.

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James, because, depending on the location of the axis of rotation, the hand pushing down can counteract the torque exerted by the snow.

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James, because the hand pushing up must exert a force that equals the sum of the force of the hand pushing down and the weight of the snow.

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James, because both (b) and (c) above are correct.

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Neither, because the hands exert forces of equal magnitudes.
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Marked as best answer by anjilletteb on Aug 6, 2020

lkoler

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Reply #1 on: Aug 6, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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anjilletteb

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Reply 2 on: Aug 6, 2020
Excellent

parshano

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Reply 3 on: Yesterday
Wow, this really help

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