Question #1228

An electron starts at rest. Gravity accelerates the electron in the negative y direction at 9.80 m/s2 while an electric field accelerates it in the positive x direction at 3.80×106 m/s2. Find its velocity 2.45 s after it starts to move.

Expert's answer

As two given accelerations are directed oppositely, the net acceleration is

a = 3.8 x 10^{6} - 9.8 = 3.8 x 10^{6} (the gravity acceleration can be neglected)

From the equations of the motion:

v= v0 +at = 0 + 3.8x10^{6}*2.45 = 9.31x10^{6} m/s.

a = 3.8 x 10

From the equations of the motion:

v= v0 +at = 0 + 3.8x10

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