2024 AP Physics 1 Free Response #5 

Thank you for your videos, you really helped me for the ap exam.

Grinded all of your videos 2 weeks before the exam on your website. After watching your FRQ videos I’m confident I got a 4-5. Thank you for the free resources, you transformed my physics skills in 2 weeks.

Slayy I got that right finding the velocity of block A was so difficult though I remember it took me like ten ish minutes - luckily the other sections were simple so I had the time

I mistook that a was moving at 1m/s initially instead of 2 and so I thought total momentum of the system was 6 and so the center of mass and block b had the right slopes but my a block had a horizontal slope am i only gonna miss only a few points?

5:32 omg i got the same velocity but made block A go to 1 meter because I thought that since the collision was elastic, the block would go the other way 😭😭😭

Do you think these year’s FRQs were easier than previous years’? Or in other words, would it take more or less points to get a 5 this year? Thank you so much for your help!

That’s crazy how I got the graph part right even when I guessed. I definitely got velocity equals 3m/s

Thanks for the vids, unfortunately I think I’ll only get a 3 or maybe a 4 on this but I’m feeling a 5 in calc bc.

Wow I got most of that right on the ap test!

I thought the graph was in ticks of 1seconds so that is the stupidest reason I got that wrong

What if I drew the lines on the graph correctly but forgot to label them? How many points do you suggest I will earn from doing this

For part c, is it possible to give a verbal explanation instead of using calculations?

I think you maybe did the last one wrong. Since the collision is inelastic, there will be some energy lost to heat/deforming. Hence, the slope of the line will be slightly lower.

what if you didn't put units for part a

i don’t even know why but for part a i tried to use conservation of energy AND conservation of momentum with the two-block system and used systems of equations to find final velocity. i ended up getting a decimal number that started with 3 (like 3.112). would i at least get a point for using conservation of energy? 😅

yes!

Hello. I accidentally forgot to square root my answer in part (a), so I had a velocity of 9m/s. I would think part (a) is two points, part (b) is three points, and part (c) is two points. Do you think if I had my center of mass line that was constant, and my block B slope that was consistent with my answer for A, I could get 3/5 of those points for parts (a) - (b), if the total is worth 5 points?

I might've gotten this one right somehow.

For part c (the final part), if I said that the line for the center of mass would not change because momentum is conserved would that be sufficient to get the points?

Oh for the last one if I said it is turn to inelastic collusion and A , B and Center of mass line be the same line is that ok?

Wait you planning to drop the physics 2 vids today or later?

Here i am again camping for physics 2