In this video David quickly explains each concept behind Forces and Newton's Laws and does a sample problem for each concept. Link to document: www.dropbox.co...
This is an amazing series. The only thing I'd change is to not reveal the answers immediately. That's such a small criticism though. This might save my ass for the AP exam.
When treating systems as objects, can you explain why certain forces aren't considered when treating the system as a single object? I don't understand why tension is disregarded and would very much appreciate help because I am taking the late AP exam next thursday.
You can ignore internal forces since they exert equal and opposite (therefore cancelling) forces on the system. For example one tension tries to speed one of the masses up, and the other tries to slow the other one down, so they offset since they’re internal. Friction would be an example of a force that’s external to the boxes system.
2020 and my AP class is still using this to cram last minute
Wow, I've been spending hours on the systems problems and you just made it clear in 2 minutes. Thank you!
This is an amazing series. The only thing I'd change is to not reveal the answers immediately. That's such a small criticism though. This might save my ass for the AP exam.
Good luck on the exam. This is the final push. Study hard!
Used this in AP physics in high school still using it for calc based physics now these are amazing
This helped me with some things I was confused on! Hopefully ill do good on my ap test tm :)
SandyBrandy805 good luck!
Another great review!
Thanks. Good luck everyone.
Such a good review man thanks!
When treating systems as objects, can you explain why certain forces aren't considered when treating the system as a single object? I don't understand why tension is disregarded and would very much appreciate help because I am taking the late AP exam next thursday.
You can ignore internal forces since they exert equal and opposite (therefore cancelling) forces on the system. For example one tension tries to speed one of the masses up, and the other tries to slow the other one down, so they offset since they’re internal. Friction would be an example of a force that’s external to the boxes system.
This may be the only reason I pass the ap exam tomorrow
No joke samw
what did you get on the exam?
Thank you so much! Your videos are incredible!
If anyone is watching in 2021 , Good luck to you!!! The exam is tomorrow!!
my exam is in 2 weeks
@@andreamontanaa Good Luck!!
Hopefully this helps with my final in physics!!
anyone else cramming for the AP test tomorrow
I sir share your grief
this is so good
great!!!!!
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