Question

Four free-particles with the same positive charge and the same initial speed are incident on the same region of constant magnetic field pointed in the +y-direction (as shown in the figure to the left below). Rank the z-component ($F_z$) of the force due to the magnetic field on the particles from greatest to least. (The +z-direction points out of the page.) [A] $F_{z1} = F_{z2} = F_{z3} = F_{z4}$ [B] $F_{z1} = F_{z4} > F_{z3} > F_{z2}$ [X] $F_{z4} > F_{z3} > F_{z2} > F_{z1}$ [D] $F_{z2} > F_{z3} > F_{z1} = F_{z4}$ [E] $F_{z1} > F_{z2} > F_{z3} > F_{z4}$

          Four free-particles with the same positive charge and the same initial speed are incident
on the same region of constant magnetic field pointed in the +y-direction (as shown in the
figure to the left below). Rank the z-component ($F_z$) of the force due to the magnetic field
on the particles from greatest to least. (The +z-direction points out of the page.)
[A] $F_{z1} = F_{z2} = F_{z3} = F_{z4}$ [B] $F_{z1} = F_{z4} > F_{z3} > F_{z2}$
[X] $F_{z4} > F_{z3} > F_{z2} > F_{z1}$ [D] $F_{z2} > F_{z3} > F_{z1} = F_{z4}$
[E] $F_{z1} > F_{z2} > F_{z3} > F_{z4}$

Four free-particles with the same positive charge and the same initial speed are incident
on the same region of constant magnetic field pointed in the +y-direction (as shown in the
figure to the left below). Rank the z-component (Fz) of the force due to the magnetic field
on the particles from greatest to least. (The +z-direction points out of the page.)
[A] Fz1 = Fz2 = Fz3 = Fz4 [B] Fz1 = Fz4 > Fz3 > Fz2
[X] Fz4 > Fz3 > Fz2 > Fz1 [D] Fz2 > Fz3 > Fz1 = Fz4
[E] Fz1 > Fz2 > Fz3 > Fz4

Added by Nathaniel S.

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