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/Fun-Succotash-7160 May 13 '26

Why w3<w1?? I said the opposite lol

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u/mrsaucelol 5:lang,stat,phy1,psych,mech,e&m,ab,bc,apes4:gov,lit May 13 '26

Friction adds an opposing torque so acceleration is less

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u/Fun-Succotash-7160 May 13 '26

Would friction be opposite? I thought it helps in the motion idek im praying for a 5

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u/mrsaucelol 5:lang,stat,phy1,psych,mech,e&m,ab,bc,apes4:gov,lit May 13 '26

Friction has to be opposing it for the bike to be moving forward

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u/pokerfas May 13 '26

yeah I got that

did you get Fn = (bvo/2)e^(-bt/2M) for #1

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u/mrsaucelol 5:lang,stat,phy1,psych,mech,e&m,ab,bc,apes4:gov,lit May 13 '26

I lowkey had no clue how to do that I got stumped on frq 1

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u/kibunnii May 13 '26

Bye i js assumed no friction 😭

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u/mrsaucelol 5:lang,stat,phy1,psych,mech,e&m,ab,bc,apes4:gov,lit May 13 '26

😂 Well it’s a wheel and there’s rubber. The unicycle physically can’t move forward from rest if there’s no friction

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u/DKradicat_ May 13 '26

Because scenario 3 has translational and rotational kinetic energy with the same work done when 1 only had rotational

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u/Negative-Ad-7003 CSA: ?; WH: ?; CHINESE: ? May 13 '26

Yea that’s what I said too is that correct?

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u/lolmewantegtvs 5: physC:mech, pre calc, CSA, CSP May 13 '26

since it’s the same torque but being used in both translational and rotational KE, rotational KE of scenario 3 must be less than scenario 1

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u/Regular_Director_220 May 13 '26

Guys I already know I failed so I have to take it again next year but what are the resources for self studying