1. The problem statement, all variables and given/known data A thin spherical shell of radius R = 0.50 m and mass 15 kg rotates about the z-axis through its center and parallel to its axis. When the angular velocity is 5.0 rad/s, its angular momentum (in kg ⋅ m2/s) is approximately: a . 15 b. 9.0 c. 12 d. 19 e. 25 2. Relevant equations L = r x mv L = Iω v = rω Moment of inertia of thin spherical shell = (2/3)mr^2 3. The attempt at a solution I seem to be getting different answer using the equations above and I can't figure out why. v = 0.5 * 5 = 2.5 L = (0.5)(15)(2.5) = 18.75 and L = (5)(2/3)(15)(0.5)^2 = 12.5 The answer is the first one (18.75) but where did I go wrong with the using L = Iω?