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7.6 Exercise 9

Avg difficulty 2.5

Before railroads were invented, goods often traveled along canals, with mules pulling barges from the bank. If a mule is exerting a 1200 N force for 10 km, and the rope connecting the mule to the barge is at a 20 degree angle from the direction of travel, how much work did the mule do on the barge?

  1. 12 MJ
  2. 11 MJ
  3. 4.1 MJ
  4. 6 MJ

OpenStax College Physics 2e, 7.6 Conservation of Energy, exercise 9

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.