Category Archives: physics

Physics! #40: Discussion Questions in Chapter 6

TweetDiscussion Questions in 6.4 Because the problem sets in this book are very long, I think I’ll chunk them into discussion, then section-based exercises, then the rest. Q6.1 “The sign of many physical quantities depends on the choice of coordinates. … Continue reading

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Physics! #39: University Physics 6.4

Tweet6.4: Power “Power” is like work, in that it doesn’t mean what you think it means precisely. It’s close, but not quite the same. Power means work/energy over time. For the calculus literate among you, power is the derivative of … Continue reading

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Physics! #38: University Physics 6.3

Tweet6.3: Work and Energy with Varying Forces This section is for people who know a liiiittle integral calculus. If you don’t, you can try to follow along qualitatively. In that case, think of an integral as a way to multiply … Continue reading

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Physics! #37: University Physics 6.2

Tweet6.2: Kinetic Energy and the Work Energy Theorem This is a short section, but understanding it is very important to understanding reality. We established last time that work is force times distance. So, when you slide along the floor in … Continue reading

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Physics! #36: University Physics 6.1

TweetChapter 6: Work and Kinetic Energy 6.1: Work Work and energy are big important concepts in physics. They can be tricky at first because your intuition about the words will lead you astray. So, repeat after me: Work in real … Continue reading

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Physics! #35: University Physics – Interesting Problems in Chapter 5, Part B

TweetInteresting Problems in Chapter 5, Part B Okay, this one totally kicked my ass. As I stated at the outset, part of why I wanted to go back through all of my physics text was that there were many things … Continue reading

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Physics! #34: University Physics – Interesting Problems in Chapter 5, Part A

TweetInteresting Problems in Chapter 5, Part A I’m going to do something a little bit different this time. In the past, I’ve worked specific fun problems. However, the problems in this section are a bit repetitive. This is by no … Continue reading

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Physics! #33: University Physics 5.5

Tweet5.5: The Fundamental Forces I always appreciate a book that takes the time to tell you something cool, especially once you reach a point where you’re more able to appreciate it. There’s really not much for me to add here, … Continue reading

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Physics! #32: University Physics 5.4

Tweet5.4: Dynamics of Circular Motion It’s a lot of fun for me to do sections like this because when I first started learning physics, this stuff was confusing. Back then I didn’t know any trig and wasn’t very good at … Continue reading

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Physics! #31: University Physics 5.3

Tweet5.2: Using Newton’s Second Law: Dynamics of Particles Here, we add an important layer of realism by throwing in the ever-present force of friction. So, you probably have a common sense notion of friction. Let’s make it a bit more … Continue reading

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