AP Physics 1 review of Energy and Work | Physics | Khan Academy
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- čas přidán 28. 07. 2016
- In this video David explains the concepts in Work and Energy and does an example problem for each concept. Link for document: www.dropbox.com/s/t1w6xlnkozz.... Created by David SantoPietro.
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AP test in 2 hours, yeehaw
HeyItsRin felt that
@Rowen Kyrie homie that's a scam, I wouldn't do that if I were you 🗿
@@heyitsrin6556 kinda weird, but how much did you score on the ap physics 1...im literally cramming fornit in the next 7 days
@@axiommandjs9007 bruh same I literally started studying yesterday and my exam is on Wednesday.
@@ieatgrass108 omg i have the exam on wednesday too i literally just started studying
I have a test tomorrow wish me luck
Obye Suncoast?
How did it go?
@@thebooby2109 yooo im suncoast
I got a test in a hour bruh
I wish I had watched it before.
This is like a quick recap of all concepts which is very helpful
bruh moment im boutta fail teacher did not prepare me for this exam
On god
I'm watching rn
bruv same. my teacher literally just has us self study. we gotta learn everything at home and we go to class just to take quizzes and do labs which require us to understand the concepts already.
Bruh my teacher said he doesn't blame people for opting out of the ap exam
tysm i have a test tmrw on this unit and this video covered everything :)
My AP teacher is making us do one-pagers on a bunch of these videos, the problem is I already took the scammy AND scummy AP test. :)) I don't want to do this anymore. I just want this school year to end. I hate physics. :D
mood how was the AP test
Hah. I'm in that situation now, where our Physics AP teacher taught us two units poorly, but for me the AP test is in an hour.
@@nlhn638 any tips? im starting ap physics in a month
@@coloredfox3463 My only recommendation is probably to do an hour to two a day.
Assuming you are on a summer break of some sorts, I would try to start learning some concepts now, because there are a number of questions on your test that will be very advanced, past what I learnt from the course honestly [there was one question, short answer, where I told them it was impossible; that was definitely the wrong answer, but my knowledge of the course, and I knew that area, told me it should have been].
Work on any released practice tests 2 months before your test, and meet your teacher often.
In our school, physics only happened once a week for half an hour, during our "free" block; if you are in a real class, you probably have better hopes, but that still isn't going to be a lot of time to learn the curriculum.
Make detailed notes, but also very good summaries.
Early on, perhaps right now, I would start learning what all the variables mean. Write that down. Write their significant units down as well, and their normal units. What is it used for.
Then I would review how to manipulate formulas, because that is a major aspect of AP physics. You don't break it into many problems, nor many formulas; you do one final formula that does everything. [And of course, other variables sometimes need to be cancelled out].
Another good thing you need to have is what all the formulas mean; what are there uses. There are also formulas you need to know that aren't given.
Sometimes you'll have to use 3 formulas just to get one variable from seemingly unrelated things, that actually relate.
And of course, while it isn't a major objective, this will be probably 10% of your mark, if not 20%. You need some understanding of the more chemical aspects of AP Physics, things on the atomic level, etc. Did you know that normal force is just the spring force of atomic particles, since when you rest an object against something, atoms due to a few forces are generally pushed away, repelling each other? That creates a spring force. Tension is similar.
My last piece of advice, or a warning I guess, is that if you are in a similar spot to me, where AP Physics is done on side of whatever normal Physics your country does, an extra, well, there is a very good chance that a number of variables and ways of showing variables use different symbols, so learning the difference is also quite important.
I wish you luck; if you need any other help, feel free to ping me here again, and I'll try to help if I can.
@@nlhn638 thanks for the tips! are there any topics you found to be difficult? also what concepts would you recommend to get familiar with now? (btw i have a little more than a month until school)
Mathematically for the last question, you can do P = Fd/t, and since the question focuses mainly on the force of gravitation, and because the force of gravitation depends on theta, you can write the force of the diagram on the left as Fsin2theta and the diagram on the left as Fsintheta and because Fsin2theta>Fsintheta, you can clearly say that the power of the diagram on the left > than the diagram on the right. Furthermore, it makes sense because if it has a larger force of gravitation then it'll take less time to get to the bottom at a higher speed. The reason I'm including this explanation is that I feel like his wasn't that great and if you were asked to explain this on an FRQ, he definitely wouldn't get all the points for that explanation.
This guy passed the AP test
wow
I have a question: Thinking about a vehicle accelerating from 0 to 60 and then slowing from 60 to 0. Is the energy to accelerate the vehicle from 0 to 60 the same as the energy to slow the vehicle from 60 to 0? ... I contend that more energy is required to accelerate to 60 than is required to slow the vehicle to 0. The reason for my conclusion is that wheel and bearing friction must be over come to accelerate the vehicle, while the same friction assists with slowing the vehicle. Therefore the energy required to slow down the vehicle is less than the energy necessary to accelerate the vehicle. ... What do you think?
Thank you 🙏🙏
Oh yeah
Hi Cherish..
boutta take a test in a few hours
Very helpful video! I just had a question.The question shown at 3:46 was referring to the system consisting of only the box, so if that is only KE, would the TME of the system A) increase then decrease or B) decrease the entire trip? I would assume that because it goes down the ramp it first picks up more velocity (thus more KE) before KE decreases. I could be wrong of course. Thanks a lot!
Anil Prasad the problem says the system is the mass and the earth but if it was only for the mass then I believe it would first increase as KE increases and then decrease as that's converted back into GPE
The same doubt I had,
I too think K will first increase then decrease
6:41
Ap test in 10 minutes 🙏🏻
My exam is in two hours and I’m actually gonna get a 2
Mood
Mood
lol what did you get
OP we need an update
Me rn
the work energy example equals 20J not -40J since the initial velocity equals -6 to the left and the final velocity equals 4 moves to the right.
No, the guy is right. Remember what happens to a negative when you square it...
Boss you’re right. I was thinking like him. Thanks for clearing my doubt.
@@FirstNameLastName-mz6ri no problem. Hope the test went well
You're right that its -6 m/s. The guy in the video messed up on that. But it gets squared, so it doesn't matter
4:30 start here
Test tomorrow
AP exam retake in 3 hours because CollegeBoard doodoo
i’m cooked
real
Oh mr. Laufer what have you done