Editor
If a force of 2 N acting through a moment arm of $\sqrt{2}$ m produces a torque of $\sqrt{6}$ Nm, what is the angle between F and r.
Difficulty: Easy
A: 
$0^{\circ}$
B: 
$30^{\circ}$
C: 
$45^{\circ}$
D: 
$60^{\circ}$
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