Rotational Kinetic Energy of Hollow Pipe vs Solid Cylinder · CAP 2008 #Q4
Physics · mechanics
Problem
A hollow pipe and a solid cylinder both have the same mass, radius, and length. They are rotating about their long central axes with the same angular speed. Which of the following is true?
(a) The pipe has a higher rotational kinetic energy.
(b) The solid cylinder has a higher rotational kinetic energy.
(c) They have the same rotational kinetic energy.
(d) Impossible to determine without numerical data for radii, masses and lengths of the pipe and cylinder.