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Physics cathode ray tube

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In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.35 x 10−17 N during the first 2.04 cm of tube's length; then they move at essentially constant velocity another 44.1 cm before hitting the screen. How long does it take them to travel the length of the tube?

Please use kinematics and please explain your answer.

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In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.35 x 10−17 N during the first 2.04 cm of tube's length; then they move at essentially constant velocity another 44.1 cm before hitting the screen. How long does it take them to travel the length of the tube? ...

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