2. A villain with mass 70.0 kg runs at a velocity of 10.0 m/s into Chuck Norris' fist moving at a speed of 0.100 m/s. The villain is knocked back at a velocity of 9.44 m/s and angle 20.0 from the horizontal, and Chuck Norris' fist moves at a velocity of 0.0500 m/s and 10.0 from the horizontal. a. What is the mass of Chuck Norris' fist in kg? b. How much kinetic energy is lost in the collision? Vi i Vzi 20 10