- copyright Randall Munroe at www.xkcd.com

#
Physics 4B -- Fall 2017

###
Paul Graham

pagraham {at} cabrillo {dot} edu

## Office Hours:

### M, W 9:45 - 10:30 am in rm 834

Fri, 10:15 - 10:45 am in rm 804

### Textbook: Halliday & Resnick, any edition.

### Stuff related to Midterm #1:

Midterm #1 will be held during our normal lab session on Friday, Oct. 13.

Equation Sheet (Suggest any additional equations you would like!)

Here are some sample problems to help you prepare:

Sample Problem #1 (with video walkthrough)

Sample Problem #2 (with video walkthrough)

Sample Problem #3 (with video walkthrough)

Sample Problem #4 (with video walkthrough)

Sample Problem #5 (with video walkthrough)

Sample Problem #6 (with video walkthrough)

Sample Problem #7 (with video walkthrough)

(*Note:* Early in the video for #7, I get distracted and include a factor of 4π *twice*. I eventually catch the mistake, but I wanted to mention it to avoid confusion!

Sample Problem #8 (with video walkthrough)

Sample Problem #9

### PLC Activities:

PLC #1 (due Fri Sep. 1)

PLC #2 (due Thu Sep. 7)

PLC #3 (due Thu Sep. 14)

PLC #4 (due Fri Sep. 22)

PLC #5 (due Fri Sep. 29)

PLC #6 (due Fri Oct. 6)

PLC #8 (due Fri Oct. 20)

### Problem Sets:

Problem Set #1 (with Solutions)

Problem Set #2 (due Fri Sep. 15)

Problem Set #3 (due Fri Sep. 22)

Problem Set #4 (due Fri Oct. 6)

### Sample Worked Problems:

Placing a charged poppyseed in equilibrium

(Involves Coulomb's Law, the nature of positive and negative charge, and Newton's Laws of Motion.)

Electron orbits in hydrogen

(Involves Coulomb's Law, the properties of electrons and protons, Newton's Laws of Motion, and circular-motion kinematics.)

Charged Quarter Circle Arcs: Ranking Problem

(Involves Electric fields and the concept of superposition.)

Charged Quarter Circle Arcs: Superposition Integral

(Involves calculating Electric fields using Coulomb's Law and superposition integrals.)

Gauss's Law: Spherical Symmetry

(Involves Gauss's Law, and simple spherically-symmetric charge distributions.)

Gauss's Law: Cylindrical Symmetry

(Involves Gauss's Law, and simple spherically-symmetric charge distributions.)

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### Labs:

What not to do: The Slope of the Plot

What to do: Lab Guidelines

Lab #1: Electric Charge (Fri Sep. 1)

Lab #2: Circuit Tools (Fri Sep. 8)

Lab #3: Ohm's Law (Fri Sep. 15)

### Comrades in Arms:

Here is a link to Joe McCullough's Physics 4B page .

Joe's page links to many useful resources; you should check it out. However, the two versions of Physics 4B will not always be identical, so remember to look here for assignments and exam-related material.

In general, PLC assignments will be nearly identical between the two pages (for the sake of the PLC tutors' sanity), labs will be similar (for the sake of John Welch's sanity), but problem sets and sample problems may differ wildly (so it can help to read both pages, for extra inspiration!)