20. A ball of mass 6.0 kg, moving at 4m/s eastward, strikes head-on a ball of mass 20kg that is moving at 4m/s westward. The balls stick together after the impact. I Physics Semester 2 Final, 2020-2021 a What is the momentum of the first ball? b. What is the momentum of the second ball? c. What is the final velocity of the combined mass after the collision? d. What was the impulse for each ball? . ​

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?