Answer on Mechanics | Relativity Question for kayna
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.
As two given accelerations are directed oppositely, the net acceleration is a = 3.8 x 106 - 9.8 = 3.8 x 106 (the gravity acceleration can be neglected) From the equations of the motion: v= v0 +at = 0 + 3.8x106*2.45 = 9.31x106 m/s.