Once again I can't seem to do this simple problem, not sure why.(adsbygoogle = window.adsbygoogle || []).push({});

hate mechanics :(

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

Charged particle enters a region containing constant magnetic field and leaves it after 708 micro seconds, what is Fx, the x component of the force after being 236 micro seconds long in the constant magnetic field

Also it travels a quarter circle(not sure if the right word, basically a half of a semicircle)

we're given:

B=1.2 T

R=0.95 m

m=5.7*10^-8 kg

2. Relevant equations

ma=qvb

3. The attempt at a solution

I calculated the constant velocity when the charge is in the magnetic field, the only problem i have is calculating Vx and Vy after 236μsec, particularly i cant find the angle, one way i tried solving it is realizing that 236/708 is 1/3, so distance that particle has traveled is

(2piR/4)/3 which i found to be 0.49742...then idk, i thought maybe the angle would be 60 deg or 30 deg since it has travelled 1/3 of the way so i tried finding Vx=V*cos(30) or Vx=V*cos(60) but it didn't work out, i think i know that on halfway the angle is 45(Vx=Vy), but that's it, basically the equation i got is

Fx=m*(V*cos(theta))^2/R and I can't find theta :(

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# Homework Help: Magnetic force

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