ice skater with mass = 80 kg moment of inertia (about her central axis) 3 kg m2. Catch baseball with outstretched arm 1m from her central axis. Ball has mass 0.3 kg and v0 = 20 m/s before the catch. V system ( skater + ball ) after catch = 0.0747 m/s Question : b. Angular speed of the system (skater + ball) after the catch ? c. Percent Kinetic Energy lost during catch ? Solution : http://imgur.com/fj0Xstv Is it correct ( answer for question c) ? If yes, why K0 or kinetic energy before the catch doesn't have rotational kinetic energy ? Ball has ω0 so it have rotational kinetic right ?