1.

A mass \[m=20\,g\] has a charge \[q=3.0\,mC\]. It moves with a velocity of \[20\,m/s\] and enters a region of electric field of \[80\,N/C\]in the same direction as the velocity of the mass. The velocity of the mass after 3 seconds in this region is

A.            \[80\,m/s\]
B.                                      \[56\,m/s\]
C.                    \[44\,m/s\]
D.                                      \[40\,m/s\]
Answer» C.                    \[44\,m/s\]


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