QUESTION S Two equal mass objects collide and stick together after the collision. One of the masses was moving before the collision. The other mass was at rest before the collision. No external forces act at any time during this process. Let Ki = the kinetic energy of the system of two masses before the collision. Let Kf = the kinetic energy of the system of two masses after the collision. What is the value of Kf/Ki? O 0.25 O 0.75 0.50 more information is needed. 1.00 QUESTION 6 A 2000 kg car and a 1000 kg car collide. Regarding the collision: Which is true about the size of the momentum-changes of the cars? the 2000 kg car receives a larger momentum-change than the 1000 kg car the 1000 kg car receives a larger momentum-change than the 2000 kg car O each car receives the same momentum-change more information is needed to answer this question Click Save and Submit to save and submit. Click Save All Answers to save