Three small, identical \(1.0-\mathrm{kg}\) pucks are attached to identical \(0.50-\mathrm{m}\) strings, tied together at a common center as shown in Figure P11.42. When whirled in circular motion at angular speed \(3.0 \mathrm{~s}^{-1}\), what are \((a)\) the rotational kinetic energy and \((b)\) the magnitude of the angular momentum about the common center?

Data from Figure P11.42