2023, Question 4 · Short Answer Paragraph Argument · 7 points · about 13 minutes
Disk and hoop pulleys pulled by strings
Find the angular acceleration of a disk pulley from the string tension, then write a paragraph explaining why a disk and a hoop gain equal angular momentum but unequal rotational kinetic energy.
This exam had five free-response questions in 90 minutes, worth 7 or 12 points each. The current exam has 4 free-response questions in 95 minutes. The skills these questions practice still count.
1 Read the question
The question is College Board's, from the 2023 exam. It starts on page 13 of the PDF.
Open Question 4 (PDF, page 13)
2 Write your answer
Answer each part the way you would on the exam, in full sentences, with your work shown. Your writing saves as you type.
3 Score it
Score your answer against College Board's scoring guidelines, one point at a time. Give yourself a point only when your answer says what the guideline asks for.
Scoring guidelines (PDF, page 15) What the exam readers saw (Chief Reader report)
Question, scoring guidelines and Chief Reader report: College Board. The title and summary are ours.