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Grade: 10

                        

Two long barges are floating in the same direction in still water, one with a speed of 9.65 km/h and the other with a speed of 21.2 km/h. While they are passing each other, coal is shoveled from the slower to the faster one at a rate of 925 kg/min; see Fig. How much additional force must be provided by the driving engines of each barge if neither is to change speed? Assume that the shoveling is always perfectly side- ways and that the frictional forces between the barges and the water do not depend on the weight of the barges.

5 years ago

Answers : (1)

Jitender Pal
askIITians Faculty
365 Points
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Therefore, the external force that must be applied by the barge moving at higher speed is 49.3 N whereas the barge moving at lower speed need not apply any force to account for the fact the barge moves with constant speed.
5 years ago
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Course Features

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  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


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