# Blimp Work Problem

1. Oct 25, 2007

### Oliviam12

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

BlimpWork A blimp of mass 100 kg is pulled at an angle $$\phi$$ = 27$$^{o}$$ downwards with respect to the horizontal for d = 10 km on level ground at a constant velocity v = 12 m/s. If the coefficient of drag (K in F = Kv^2) is 0.5 kg • m, how much work in Joules is done by the puller?

2. Relevant equations
W=Force * Distance

3. The attempt at a solution
This is an example I found and the work they show is:

Force = Kv^2 = 0.5 kg/meter • (12 meters/second)^2
Distance = 10 km
0.5 kg/meter • (12 meters/second)^2 • 10 km= 720000 J

and obviously the last part doesn't multiply correctly. Is this problem worked incorrectly or am I missing something? I am trying to do a similar problem but, I get the wrong answer when I emulate the above... If the example is wrong how do you work the problem? If not, what am I missing? Also, what about cos $$\theta$$?

Last edited: Oct 25, 2007
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