Homework Help: 12th grade

Posted by Rae Lee on Wednesday, February 17, 2010 at 11:59pm.

In a TV set, a beam of electrons is shot horizontally from the rear of the TV tube toward the screen with a speed about 1x10^7 m/s. If the distance from the rear of the TV set to the front is .5m, approximately how far do the electrons drop because of the gravity as they move across the tube?

physics - drwls, Thursday, February 18, 2010 at 6:06am
Please indicate your subject as the "school subject", not your grade level.

First calculate how long it takes the electrons to travel the length of the TV tube:

t = 0.5 m / 10^7 m/s = 5.0*10^-8 s

The distance they fall in this time is Y = (1/2) g t^2

g is the acceleration of gravity

Compute Y

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