2nd Edition

ISBN: 9780805303087

Author: Randy Harris

Publisher: Addison Wesley

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Chapter 2, Problem 47E

Consider Anna, Bob, and Carl in the twin paradox. (a) According to Anna, when Planet X passes her, clocks on Planet X and Earth tick simultaneously. Using the Lorentz transformation equations, calculate the time interval between these two events In the Earth−Planet X frame. (b) According to Carl, when Planet X passes, clocks on Planet X and Earth tick simultaneously. What is the time interval between these events in the Earth−Planet X frame? (c) What does the clock on Planet X read when Carl and Anna reach it? Show how your results from parts (a) and (b) agree with Figure 2.20.

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Chapter 2, Problem 46E

Chapter 2, Problem 48E

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The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE DO NOT USE LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!

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The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE ONLY TRIGNOMETRIC FUNCTIONS (SIN/TAN/COS, NO LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!

Chapter 2 Solutions

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