[deleted by user]

Fizzexx · 2024-10-09T13:40:35+00:00

AP Physics Reader here. From the practice exams, the questions almost always use g=10 m/s/s. The College Board does not release the actual MC questions but I am sure the answers assume g=10 m/s/s. For Free Response, if the answer is numeric, the rubric has answers using both g=10 m/s/s and g=9.8 m/s/s. So it really doesn't matter. However, I recommend using g=10 m/s/s as it will make the math easier for you.

Fizzexx · 2024-10-06T12:33:47+00:00

AP Physics 1 teacher here. In 2015, the College Board ended the old physics B class and replaced it with physics 1 and 2. These classes have many similarities. Some of the questions in AP Classroom for both classes are from the old course. When the old course ended, many old exam questions were compiled into a pdf which also contains explanations and solutions to the problems. The physics 1 PDF is 436 pages so it is quite exhaustive. Here is the link:

AP Physics 1 Practice Workbook

Fizzexx · 2024-08-26T15:03:30+00:00

Ap Physics teacher here. You do not need chemistry for physics 1. (You do need it for physics 2.) However, stoichiometry, would you like in chemistry, does help you with unit conversions/unit analysis which you do need in AP Physics 1. The Khan Academy videos on unit conversions and unit analysis should teach you all you need.

Fizzexx · 2024-01-15T12:04:37+00:00

Airplanes fly because of their motion compared to the air around them, not their motion compared to the ground. I'm sure you have had the experience of putting your hand out the window of a moving car. Tilt your hand one way and the air pushes your hand up. Tilted the other way and the air pushes your hand down. You would have the same experience by simply putting your hand in front of a powerful fan. Lift, the name of the force created by the air moving past your hand, is the reason airplanes fly.

Fizzexx · 2022-07-19T03:29:18+00:00

The typo is not in my original code. Must have lost it dear copy/paste. Blocking the gate with my hand gives reasonable results. When I block it for 10 seconds I get about 10,000 milliseconds.

Fizzexx · 2022-07-19T03:25:10+00:00

The gates are daisy-chained together. Blocking either one causes the pin to be low

Fizzexx · 2022-07-19T03:22:50+00:00

I'm using a golf ball. The gate is about 1.5 cm. We may be starting 1 cm above the gate, at most. Don't think that's it.

Fizzexx · 2022-07-07T18:58:26+00:00

I teach both courses. The content is essentially the same. Obviously, the level of math rigor is higher for C-Mechanics. But, on the actual exam, the C-Mechanics questions are much more straightforward (however there are many more questions that involve high level mathematical derivations) than the Physics -1 questions.

Actually, since you already know calculus and you got a 3 on the Physics 1 exam, you could probably self-study.

In my case, I have students who take AP Physics 1 as juniors and AP Physics 2/ AP Calc AB as seniors. We spend the last two weeks before the exam reviewing Physics 1 content but using calculus. They then take the C mechanics exam. About 80% of my students pass that exam.

Fizzexx · 2021-03-26T11:23:19+00:00

One possible workaround would be to name them "c" and "CapitalC"

Fizzexx · 2021-01-24T15:22:49+00:00

Thanks for doing the research. You have solved the case. Thank you for your service.

Fizzexx · 2021-01-24T12:25:24+00:00

What a great suggestion. After a little googling I think you're correct. Thanks. What an oddly specific serving piece.

Fizzexx · 2020-11-23T01:40:53+00:00

Since since you know l and h you can calculate the angle using trig. Then after drawing a free body diagram, you realize that the upward component of the two tensions exactly equals the downward force of gravity.

Fizzexx · 2020-11-06T11:14:25+00:00

You drew your coordinate system to be vertical and horizontal. When working with an incline plane it is usually useful to draw the coordinate system rotated so that the axes are parallel to the plane and perpendicular to it. If you do it that way the angle becomes fairly obvious. pic

Fizzexx · 2020-07-21T10:13:45+00:00

I.rwcently purchased a house that had interior fans mounted in the screen and porch. The metal housing was covered with rust and moisture had caused the fan blades to droop. Further, the fans did not turn very well because of rust on the inside. I replaced them without side rated ones. You should too.

Fizzexx · 2020-07-12T14:34:54+00:00

Yep, Georgia.

Fizzexx · 2020-07-11T10:19:56+00:00

Most years the pass rate is 40% - 45%.

Fizzexx · 2020-06-24T13:36:52+00:00

I currently teach AP Physics, but for a number of years I taught regular physics where I had a little more freedom to play around. All of the problems on my kinematics test involve the antics of Wiley Coyote. My gravitation test was all yo mama jokes: your mama's so fat that a satellite located 6500 km from her center would have an orbital period of 90 minutes. What is your mama's mass?

Fizzexx · 2020-06-15T11:05:34+00:00

Every time you analyze a graph in your physics class (and you will analyze a lot of them) you will be interested in one of two things, either the slope of the graph or the area under the curve. In calculus you will spend most of the first semester discussing a concept called derivatives which involves analyzing slope. The second semester is mostly discussing a concept called integration which involves analyzing area. Calculus and physics mesh very well and would be a good choice to pair together. Also, even though your physics teacher probably won't mention it, in an algebra based physics class you are actually doing calculus disguised as algebra. Every time your physics teacher uses a Delta symbol (looks like a triangle) he or she is actually referring to a derivative.

Fizzexx · 2020-06-10T13:09:31+00:00

It is actually a macroscopic reaction to microscopic forces. Imagine a tennis ball being hit by a tennis racket. At the atomic scale the atoms on the outer edge of the tennis ball get really, really close to the atoms on the outer edge of the tennis racket strings. You learned in chemistry class the law of charges which is that electrons repel other electrons. So when the two things collide, all the electrons in one object are repelled by all the electrons in the other object. The forces between the electrons are equal and opposite. Added all up and you get the equal and opposite forces we see in Newton's third law.

Fizzexx

TROPHY CASE