z u u A long, thin rod of length l = 0.50 m and moment of inertia I = 0.15 kg-m2 can rotate around a frictionless axis through its end (located at the intersection of the dashed lines in the diagram at right). The rod initially hangs vertically from the axis. A sphere traveling to the east at speed v = 10 m/s strikes the rod at its midpoint, as shown at right. The collision causes the sphere to stop moving sideways and drop straight to the oor, while the rod swings to the right with an initial angular speed of 9 rad/s. . What is the mass of the sphere? Ans:0.540 Kg