A proton moves with speed in a region where is towards the east and is vertically upward

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A proton moves with speed

2.0\times10^{6}\,\text{m s}^{-1}

in a region where

\vec E

3.0\times10^{4}\,\text{N C}^{-1}

towards the east and

\vec B

0.20\,\text{T}

vertically upward. The velocity of the proton is towards the north. Calculate the magnitude of the net force acting on the proton at this instant.