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22 January, 18:27

You need to raise a heavy block by pulling it with a massless rope. You can either (a) pull the block straight up height h, or (b) pull it up a long, frictionless plane inclined at a 15∘ angle until its height has increased by h. Assume you will move the block at constant speed either way.

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  1. 22 January, 19:45
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    the correct answer would be B. have a good day!
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