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May 29, 2015

Homework Help: physics14

Posted by jm on Thursday, February 16, 2012 at 8:07pm.

In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 cm before hitting the screen.
(a) Find the speed of the electrons when they hit the screen.
1 Incorrect: Your answer is incorrect. m/s
(b) How long does it take them to travel the length of the tube?
2 Incorrect: Your answer is incorrect. ns

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