Calculating Charge Ratio in a Uniform Magnetic Field

[thompson.1674]

magnetic force help ?

Homework Statement

Two charged particles move in the same direction with respect to the same magnetic field. Particle 1 travels eight times faster than particle 2. However, each particle experiences a magnetic force of the same magnitude. Find the ratio q1/q2 of the magnitudes of the charges.

Homework Equations

B=F/qVsin(theta)

The Attempt at a Solution

BqVsin(theta)=BqVsin(theta)
and then B and sin(theta) cancel but i don't know where to go from here??

 

[rock.freak667]

$$F=BQVsin\theta$$

For the first charge,Q1.

$$F=BQ_1V_1 sin\theta$$

For the 2nd charge,Q2

$$F=BQ_2V_2 sin\theta$$


what is the relation between V1 and V2?

 

[thompson.1674]

okay cool thanks i got it.