three 0.04 kg particles have been glued to a rod of length L = 13 cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate
(a) from 0 to 20.0 rad/s,
(b) from 20.0 rad/s to 40.0 rad/s, and
(c) from 40.0 rad/s to 60.0 rad/s?
(d) What is the slope of a plot of the assembly's kinetic energy (in joules) versus the square of its rotation rate (in radians-squared per second-squared)?