2025, Question 1 · Mathematical Routines · 10 points · about 25 minutes

Block dropped onto a moving cart

Sketch the system's momentum over time, derive the final speed and the kinetic energy lost when a block lands and sticks on a cart, and decide whether momentum changes when a block slides before moving with the cart.

1 Read the question

The question is College Board's, from the 2025 exam. It starts on page 3 of the PDF.

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2 Write your answer

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Scoring guidelines (PDF, page 2) What the exam readers saw (Chief Reader report)

Question, scoring guidelines and Chief Reader report: College Board. The title and summary are ours.