Problem 3 This figure shows the position vs. time graphs for two objects before and after they collide. Assume that they form an isolated system. (a) What are the velocities of the two objects before and after the collision? (Hint: you will get a more accurate result if you choose the initial and final times where the lines go exactly through a point on the grid shown.) (b) Given the result in (a), what is the ratio of the inertias of the two objects? x (m)+ 3 m object 1 2 m- object 2 1 m Collision region object 1 object 2 1's 1.5s 2s 1.75 s 3's t(s) Problem 4 A 2-kg object, moving at 1 m/s, collides with a 1-kg object that is initially at rest. After the collision, the two objects are found to move away from each other at 1 m/s. Assume they form an isolated system. (a) What are their actual final velocities in the Earth reference frame? (b) What is the velocity of the center of mass of this system? Does it change as a result of the collision?