학술논문
My Favorite Exam Question
Document Type
Journal Articles
Reports - Descriptive
Reports - Descriptive
Author
Source
Subject
Language
English
ISSN
0031-921X
Abstract
My favorite exam question comes from the final exam in an introductory mechanics course: "A rolling 31 ton railroad boxcar collides with a stationary flatcar. The coupling mechanism activates so the cars latch together and roll down the track attached. Of the initial kinetic energy, 38% dissipates as heat, sound, vibrations, mechanical deformation, and so forth. How much does the flatcar weigh?"