27.35. Set Up: The work done equals the change in kinetic energy: For an electron The kinetic energy K is the work done to bring the electron from rest to speed The nonrelativistic expression for kinetic energy is Solve: (a) (b) (c) To bring an electron from rest to a speed of 0.900 c requires total work This is the kinetic energy at a speed of 0.900 c . (i) (ii) The nonrelativistic expression gives a ratio of 27.36. Set Up: The nonrelativistic kinetic energy is The relativistic kinetic energy is Solve: (a) and (b) The graphs of and are shown in Figures 27.36a and b. In both cases K is zero when The nonrelativistic graph extends beyond is the same as at small but becomes larger than as increases. As As increases without limit. Figure 27.36 27.37. Set Up: If an object has length when it is at rest relative to the observer making the measurement, then when it is moving at speed u its length along the direction of motion is measured by the observer to be l , where For the markings on an empire ship to appear circular,
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This note was uploaded on 03/06/2009 for the course PHYS 114 taught by Professor Shoberg during the Spring '07 term at Pittsburg State Uiversity.