\textbf{184-} A proton moves at an angle of $90°$ with respect to a magnetic field of magnitude $2\circ \text{ m T}$ and a magnetic force of $1.28\times10^{-16}$ N is exerted on it. What is the kinetic energy of the proton in electron volts?
$(m_p = 1.7\times10^{-27}\ \text{kg}\ \text{ and }\ e = 1.6\times10^{-19}\ \text{C})$
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(1) $2.5$ \hspace{2cm} (2) $5$ \hspace{2cm} (3) $8.5$ \hspace{2cm} (4) $17$
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