An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to elect

Question

An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.41 105 m/s to a final velocity of +1.95 106 m/s while traveling a distance of 0.034 m. The electron's acceleration is due to two electric forces parallel to the x axis: vector F 1 = +6.75 10-17 N, and vector F 2, which points in the -x direction. Find the magnitudes of the net force acting on the electron and the electric force vector F 2.

Explanation / Answer

v=1.95 *106 m/s

u=5.41*105 m/s

s=0.034 m

using v2-u2=2as

acc=-5.16*1013 m/s

net force= mass*acc

=9*10-31 * -5.16*1013

=-4.6*10-17 N

net force= F1+F2 {given F1= 6.75'*10-17}

F2=-11.35*10-17 N

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