# Homework Help: Help with Mechanics Problem Needed

1. Oct 17, 2007

### cmseybold

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!!

2. Oct 17, 2007

### Hootenanny

Staff Emeritus
HINT: P = Fv

Last edited: Oct 17, 2007
3. Oct 17, 2007

### qspeechc

We need the resistance to calculate 1) if I am not mistaken.

4. Oct 17, 2007

### Hootenanny

Staff Emeritus
We don't actually...

5. Oct 17, 2007

Ok, :)