1095_Physics ProblemsTechnical Physics

1095_Physics ProblemsTechnical Physics - 436 Relativity v =...

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436 Relativity P39.2 (a) vv v TB =+= 60 0 . ms (b) =−= 20 0 (c) vvv =+ = += 22 2 2 20 40 44 7 P39.3 The first observer watches some object accelerate under applied forces. Call the instantaneous velocity of the object v 1 . The second observer has constant velocity v 21 relative to the first, and measures the object to have velocity 212 1 =− . The second observer measures an acceleration of a vv 2 21 == d dt d dt . This is the same as that measured by the first observer. In this nonrelativistic case, they measure the same forces as well. Thus, the second observer also confirms that Fa = m . P39.4 The laboratory observer notes Newton’s second law to hold: 11 = m (where the subscript 1 implies the measurement was made in the laboratory frame of reference). The observer in the accelerating frame measures the acceleration of the mass as aaa (where the subscript 2 implies the measurement was made in the accelerating frame of reference, and the primed acceleration term is the acceleration of the accelerated frame with respect to the
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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