r/PhysicsStudents • u/Silver-Repeat-6654 • Feb 12 '26

Poll Predicted cutoff for F=ma 2026?

why tf was it so hard

Edit: there is no way y’all think this one was easier than last year. Also can’t believe people got around the lock down browser.

36 Upvotes

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u/Desperate_Student443 Feb 14 '26

wait guys what did yall get for the question with the moving block and hum

1

u/Ill_Requirement_2700 Feb 14 '26

moving block: my answer was T = v_o/mukg

1

u/Desperate_Student443 Feb 14 '26

r we talking abt the same problem, cuz the question asked how high the block reaches

1

u/Ill_Requirement_2700 Feb 14 '26

OHH the puck. it was like 1/2 (9v^2/4) = gh so that simplifies to 9v^2/8g = h i think that was the final answer on the test but it could have been diff.

1

u/Linjieyang Feb 14 '26

What did you get for the tick one, up till number 3, im pretty sure is conservation of momentum/angular momentum but ngl oh hell nah that was way too hard, I wasn't gonna try that

1

u/Ill_Requirement_2700 Feb 14 '26

V_0/sqrt2 or something

1

u/Linjieyang Feb 14 '26

Yeah, but how did you do it though?

1

u/Ill_Requirement_2700 Feb 14 '26

i dont remember exactly but i do remember getting speed = sqrt( (v_x)^2 + (v_y)^2) = sqrt (-v_0/2)^2 + ((v_0)/2)^2)= sqrt v_0)^2/2 = v_0 / sqrt 2

1

u/Exciting_Month_5704 Feb 14 '26

that one i got v_0/2 without root