Physics for Scientists and Engineers
10th Edition
ISBN: 9781337553278
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 5, Problem 11P
Review. An electron of mass 9. 11 × 10−31 kg has an initial speed of 3.00 × 105 m/s. It travels in a straight line, and its speed increases to 7.00 × 105 m/s in a distance of 5.00 cm. Assuming its acceleration is constant, (a) determine the magnitude of the force exerted on the electron and (b) compare this force with the weight of the electron, which we ignored.
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An electron of mass 9.11 x 10-31 kg has an initial speed of 3.00 x 105 m/s. It travels in a straight line, and its speed increases to 7.00 x 105 m/s in a distance of 5.00 cm. Assuming its acceleration is constant, (a) determine the magnitude of the force exerted on the electron and (b) compare this force with the weight of the electron, which we ignored.
An electron of mass 9.11 x 1031 kg has an initial speed of 2.20 x 10° m/s. It travels in a straight line, and its speed increases to 7.40 x 10° m/s in a distance of 5.60 cm. Assume its
acceleration is constant.
(a) Determine the magnitude of the force exerted on the electron.
N
(b) Compare this force (F) with the weight of the electron (F), which we ignored.
F
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In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.40 x 10-17 N during the first 2.70 cm of the tube's length; then they move at essentially constant velocity another 45.0 cm before hitting the screen.
Find the speed of the electrons when they hit the screen.
Chapter 5 Solutions
Physics for Scientists and Engineers
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