University of California San Diego, Department of Physics
Winter 2010 Physics 2D
Homework Solutions

Homework 1 Solutions (PDF) posted 1/7/10

Note: For question 16 of Chapter 1 I accidentally swapped the source and observed frequencies. This caused me to get the correct magnitude for the velocity but the wrong sign. You can check from the equation that we used that this makes sense. Thanks to the student who pointed this out to me.

Homework 2 Solutions (PDF) posted 1/11/10

Note: For question 3 of Chapter 2, there is a sign error in the exponent: it should be 3/2 not -3/2 since the 1-v^2/c^2 is already in the denominator. This sign error is carried all the way through to the end. The result should be F=gamma^3*m*a, NOT F=gamma^-3*m*a, as it reads in my solution. Thanks to the student who looked through the derivation carefully and pointed this out to me.

Homework 3 Solutions (PDF) posted 1/19/10

Note: In question 26 of Chapter 2, in the line where I divide Equation (2) by Equation (1), the left side should read Uc/c^2, not Uc/c. Notice that now there is a factor of 1/c^2 on both sides, which cancel.

Homework 4 Solutions (PDF) posted 1/25/10

Homework 5 Solutions (PDF) posted 2/1/10

Homework 6 Solutions (PDF) posted 2/8/10

Note: These solutions were written in a hurry, so you might find the explanations lacking. If you have questions, come to the scheduled class times/office hours and ask questions. I'll try to be more complete again starting next week.

Homework 7 Solutions (PDF) posted 2/16/10

Homework 8 Solutions (PDF) posted 2/22/10

Note: I think I forgot to do #7 in Chapter 7, so here is the solution from the solutions manual, in case you don't have it.

Additional note: My R is off by 100 in #4. The real answer is R = 0.0018.

Homework 9 Solutions (PDF) posted 3/1/10

Note: This is your final homework assignment. There is no new homework for the last week of class.