08:20

University Physics with Modern Physics

A particle with a charge of -1.24 $\times$ 10$^{-8}$ C is moving with instantaneous velocity $\vec{v} =$ 14.19 $\times$ 10$^4$ m/s)$\hat{\imath}$ + (-3.85 $\times$ 10$^4$ m/s)$\hat{\jmath}$. What is the force exerted on this particle by a magnetic field (a) $\overrightarrow{B} =$ (1.40 T)$\hat{\imath}$ and (b) $\overrightarrow{B} =$ (1.40 T) $\hat{k}$ ?