A wheel is comprised of two 50.0 cm long thin rods of negligible mass and a thin metal ring with a mass of 10.00 kg, mounted on a very low friction bearing. A 100 gram lead weight is shot horizontally at the stationary wheel with an initial speed of 50.0 m/s and sticks to the rim of the wheel. What is the rotational speed of the wheel plus lead mass immediately after the collision? Give your answer in revolutions/second.
L_f=(I_a + I_b)W_f
The Attempt at a Solution
I know of to find the moments of inertia im just confused about how to find L_f. The bullet would be travelings in a linear momentum not angular. How can i find this value?