An electron with initial velocity v0 = 3.5 105m/s enters a region 1.0 cm long,?

Question

where it is electrically accelerated .It emerges with velocity v = 4.10 106 m/s. What was its acceleration, assumed constant? (Such a process occurs in old-fashioned television sets.)

Answer 1

Use the formula

x = (V^2 - V0^2)/(2a) and solve for a

a = (V^2 - V0^2)/(2x)

a = [(4.1x10^6)^2 - (3.5x10^5)^2]/(2*1) = 8.34x10^12 cm/s