In a cathoderay tube electrons are projected horizontally at

In a cathode-ray tube, electrons are projected horizontally at 1.1×106 m/s and travel a horizontal distance 12.5 cm across the tube. (a) How long are the electrons in flight? (b) Find the vertical distance the electrons fall (under the influence of gravity) during their flight. (Correct answers will receive thumbs up)

Solution

Part A)

Apply d = vt

.125 = (1.1 X 10^6)t

t = 1.1364*10^-7 sec

Part B)
d = vot + .5at^2

d = (0) + (.5)(9.8)(1.1364*10^-7 )^2

d = 6.3275X 10^-14 m