Proton moving in magnetic field

[sdevoe]

Homework Statement

At a particular instant a proton is traveling in the +z direction, with speed 4105 m/s. At the location of the proton there is a magnetic field of magnitude 0.25 T in the +x direction, due to current running in a nearby coil.
what is the direction and magnitude of force on the proton?

Homework Equations

none i think?

The Attempt at a Solution

Do you use the right hand rule possibly?

 

[danago]

The right hand rule can give you the direction of the force, but not the magnitude.

What equation do you know that gives the force on a charged particle of charge q moving with velocity v in a magnetic field of strength B?

 

[rl.bhat]

Try to find out the formula for the force on a charged particle in a magnetic field. The direction of the field is given by the left hand rule.

 

[sdevoe]

the equation is F=qvB but then using the left hand rule since it is a proton would give me negative y direction if I'm not mistaken and that is incorrect?

 

[rl.bhat]

You can use either right handed screw rule or Flemming's left hand rule.