# What is the magnitude of the third force? [closed]

Three forces act on an object which is moving at a constant velocity. Two of the forces are $3.0N\hat{i}$ and $4.0N\hat{j}$. What is the magnitude of the third force?

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 en.wikipedia.org/wiki/Pythagorean_theorem – Ignacio Vazquez-Abrams Sep 30 '12 at 1:02

## closed as too localized by Mark Eichenlaub, dmckee♦Sep 30 '12 at 2:07

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