Help with Mechanics Problem Needed

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Homework Help Overview

The problem involves mechanics, specifically the forces acting on a barge being pulled by two horses. The discussion focuses on calculating tension in the cables and determining the maximum steady speed of the barge based on the horses' power output and the resistive force from the water.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the need to calculate resistance to address the first part of the problem. There is a hint provided regarding the relationship between power, force, and velocity.

Discussion Status

The discussion is ongoing, with participants exploring the necessary calculations and relationships between the forces involved. Some guidance has been offered, but there is no explicit consensus on the approach to take.

Contextual Notes

There is a mention of the resistive force varying with the speed of the barge, which may influence the calculations. The original poster seeks assistance particularly with the second part of the problem.

cmseybold
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Two horses are pulling a barge as shown. Both hourses can each work at a maxiumum rate of 2 horsepower=1500W.

(The picture shows a barge headed in the right direction, with the horses pulling at 30 degrees relative to the displacement. so they are pulling sideways in both directions)

1) When the horses are walking at a steady speed of 1.73 m/s, Calculate the tension in the cables.

2) If the water exerts a resistive force on the barge that varies with the barges speed as 120v (Newtons) where v is the speed of the barge in the water, calculate the maximum steady speed of the barge when each horse is exerting his maximum horsepower.

Any help on this question, especially the second part, would be much appreciated!
 
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HINT: P = Fv
 
Last edited:
We need the resistance to calculate 1) if I am not mistaken.
 
qspeechc said:
We need the resistance to calculate 1) if I am not mistaken.
We don't actually...
 
Ok, :)
 

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