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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?

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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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