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**One component of a magnetic field has a magnitude of 0.0266 T and points along the +x axis, while the other component has a magnitude of 0.0648 T and points along the -y axis. A particle carrying a charge of +2.96 × 10-5 C is moving along the +z axis at a speed of 4.71 × 103 m/s. (a) Find the magnitude of the net magnetic force that acts on the particle. (b) Determine the angle that the net force makes with respect to the +x axis.**

**I got the correct answer for part A, which is simply 9.77x10-3 N.**

Fx ~ 0.003708 N

Fy ~ 0.009034 N

F = sqrt(Fx^2 + Fy^2)

**F = 9.77x10-3 N**

However, I am not getting the correct answer for B.

**I thought it was simply:**

theta = InverseTangent(Fy/Fx) = 67.68 deg but this wasn't correct.

Then I thought I had to add 90 to get theta = 67.68 + 90 = 157.68 deg since F is perpendicular to both field (B) and velocity (V), but this was not correct either. What am I doing incorrectly? Thank you!

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