5. A solid steel disl

F:5N ego-cv o 5. A solid steel disk E=200XIOA9 N/mA2 start rotation from the rest with constant acceleration. When the disk changed an angular position by 180 degrees, a small disk attachment (hummer) hit an aluminum rod E = 70 x IOA9 N/mA2. At that moment the angular velocity was 2500 rad/s. Diameter of the aluminum rod is 0.1 m. Please, find strain in the rod. Mass of the disc is 10 kg t asoo Ee,le.L2