# Force of water on a pulled barge with angle

1. Feb 21, 2009

### bravohimz

1. The problem statement, all variables and given/known data

Suppose that the horse pulls on the rope with a force of 7900 N at an angle of 18° to the direction of motion of the barge, which is headed straight along the canal. The mass of the barge is 9200 kg, and its acceleration is 0.10 m/s2. What are the magnitude and the direction of the force on the barge from the water?

(a) Magnitude

(b) Direction (counterclockwise from the +x axis is positive)

2. Relevant equations

f=ma
trigs

3. The attempt at a solution

I trigged it;

(mass of the barge x the acceleration)-force of the horse cos (angle) = nope

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2. Feb 21, 2009

### Staff: Mentor

What forces act on the barge? (The force of the water will be your unknown.) What's the net force on the barge? Set the net force = ma. Consider components parallel and perpendicular to the direction of motion.

3. Feb 21, 2009

### bravohimz

ohhhhhh
thank you so much !