My Favorite Exam Question
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?
Styer, Dan. 2015. "My Favorite Exam Question." The Physics Teacher 53: 535.
American Association of Physics Teachers
Physics and Astronomy
Physics education, Atmospheric pressure, Kinematics, Angular momentum, Atmospheric water