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jawapan part 1 a

jawapan part 1 a - 820502025683 MAD SAIPON NIZAR BIN ZAINON...

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820502025683 MAD SAIPON NIZAR BIN ZAINON JP/6932/10 PUSAT PENDIDIKAN JARAK JAUH UNIVERSITI SAINS MALAYSIA JIF 103 PHYSICS 1/Practical 1a Academic session 2010/2011 Assignment 1 Part A Assignment due date: 15 Sept 2010 Answer ALL questions. Please use your own words. Any plagiarism or copying the works of others will be given ZERO mark. 1. Einstein’s principle of relativity states that the law of physics is the same in every inertial reference frame. Does this mean that the value of the variables must be the same in every reference frame? Discuss your answer with the help of an example. "A1. There is probably more than one correct answer to this question. A possible one  would be (1) the speed of light, and (2) the relative speed between the two observers  must remain the same in every reference frame. This last one can be measured using  the relativistic Doppler effect.  Without loss of generality, we consider only the x coordinate and time. Let (S) be the laboratory frame in which the coordinates of a particle are x and t and let (S’) be the coordinate frame moving along the positive x direction with speed V and in which the coordinates of the previous particle are x’ and t’. Using the (nonrelativistic) Galilean coordinate transformation, we have t t t V x x = + = Since t d dt = the velocity transformation is V v v + =

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820502025683 MAD SAIPON NIZAR BIN ZAINON JP/6932/10 Multiplying through by the mass m (same in both frames!) we get mV v m mv + = Since the momentum of the particle is mv p = in frame (S) and v m p = in frame (S’), we have mV p p + = Assuming the mass m does not change with time, the time rate of change of the momentum of the particle as seen in the two frames will be
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jawapan part 1 a - 820502025683 MAD SAIPON NIZAR BIN ZAINON...

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