Challenge Problem bet you can't figure out

1. Oct 21, 2004

SoberSteve2121

For a charged particle the Velocity Vector is in the i direction and the magnetic field is in the -k direction, prove using Newton's Second Law that the trajectory of this charged particle must be circular. (Hint F=q(V x B) this is the magnetic Force equation.)

2. Oct 21, 2004

kuenmao

I suspect that this belongs to the homework help zone.

How hard is that? Think of the direction of the electromagnetic force with respect to the particle's motion.

3. Oct 21, 2004

ZapperZ

Staff Emeritus
Don't tell him that there's an even more "difficult" problem where the charge particle has an initial velocity at an arbitrary angle to the magnetic field. I'm sure we can't solve it to get the helical path that the charge particle makes.

:)

Zz.

4. Oct 21, 2004

Gokul43201

Staff Emeritus
I'm not sure the OP will get the sarcasm in that second statement, so...