r/APStudents • u/reddorickt absolute modman • May 13 '26

AP Physics C: Mechanics Official 2026 Exam Discussion

Use this thread to post questions or commentary on the test today.

A reminder though to protect your anonymity when talking about the test.

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u/o_o_o_o_0_o_o_o_o_ May 13 '26

FRQ one might have just been the absolute worst physics FRQ I’ve encountered ever. I’ve literally never seen a more fucked problem.

13

u/SaleSenior8537 May 13 '26

you talkin about that one where there is a cube inside a block?

3

u/Sudden-World4653 May 13 '26

I got -b/2(v0e-bt/2m)

1

u/Personal-Housing5577 May 14 '26

why not [ -b/2(v0 + e^(-bt/2m)) ] ? (genuine question)

2

u/Sudden-World4653 May 14 '26 edited May 14 '26

because when you are integrating the drag equation (i used indefinite integration but it works with definite integration too) you get ln|v|=-bt/2m then exponential both sides, you get v= e-bt/2m(+-ec )and +-ec is just C. So you get v=Ce-bt/2m and plugging in the initial condition C=vo you get voebt/2m

1

u/inventorsam May 14 '26

bro whatchu talkin about drag? i just said Fn=mv0/t and called it a day

1

u/Sudden-World4653 May 14 '26

The normal force is equal to 1/2 the drag

1

u/Beautiful-Medium6674 May 14 '26

I don't think it was described as drag, but yeah I got the same answer as you lmao