Consider a scenario in which the flywheel described in part a (r₁=1.1 m, mass m₁=12 kg, v=25 m/s at the rim) is spinning freely at its maximum speed, when a second flywheel of radius r₂=1.6 m and mass m₂=23 kg is coaxially dropped from rest onto it and sticks to it, so that they then rotate together as a single body. Calculate the energy, in joules, that is now stored in the wheel.
