Chapter 28, Problem 3P

An electron that has an instantaneous velocity of

$\stackrel{\to }{v}=\left(2.0\times {10}^{6}m/s\right)\text{<mover accent="true"> <mrow> <mo> i </mo> </mrow> <mo> ^ </mo> </mover>}+\left(3.0\times {10}^{6}m/s\right)\text{<mover accent="true"> <mrow> <mo> j </mo> </mrow> <mo> ^ </mo> </mover>}$

is moving through uniform magnetic field $\stackrel{\to }{\text{B}}=\left(0.030\text{T}\right)\text{<mover accent="true"> <mrow> <mo> i </mo> </mrow> <mo> ^ </mo> </mover>}-\left(0.15\text{T}\right)\text{<mover accent="true"> <mrow> <mo> j </mo> </mrow> <mo> ^ </mo> </mover>}$. (a) Find the force on the electron due to the magnetic field. (b) Repeat your calculation for a proton having the same velocity.