Iona Prep Physics Puzzles

Rotational Dynamics Problem 4

Description

The animation depicts an idealized drivetrain for a bicycle. A large green disk (i.e. a flat cylinder) is used to rotate a small green disk of the same density and thickness via a massless chain that does not slip (position of a point on the edge of each disk is shown in meters and time is shown in seconds). 

Question

What is the ratio of the kinetic energy of the green disk to the kinetic energy of the red disk (K_green/ K_red)? Start

Reference

See Giancoli-PA: 8-7, Giancoli-SE: 10-7.

Credits

Physlet problem authored by Aaron Titus and modified by Mario Belloni.

© 2000 by Prentice-Hall, Inc. A Pearson Company