What is the equation for change of momentum inelastic collision. I’m not understanding it. I know you multiply mass times velocity and then add the other. But where do you divide

A 5 kg blob of clay is moving forward at 2 m/s when it has an inelastic collision with a 2kg blob of clay initially at rest. What will be the final velocity of the two blobs after they stick together?

Please asap

I.  A lump of clay (m = 3.01 kg) is thrown towards a wall at speed v = 3.15 m/s.  The lump sticks to the wall.  (a) What kind of collision is it?  Is momentum conserved during this collision?  Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision.   II.  Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.15 m/s. (a) What kind of collision is it?  Is momentum conserved during this collision?  Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision.   III.  Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.24 m/s. (a) What kind of collision is it?  Is momentum conserved during this collision?  Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic…

I need Part 4.

How would you find the velocity of the cue ball after the collision? (Please include magnitude and direction). Also, would this be an elastic or inelastic collision?

TWO-PART QUESTION  PART ONE: A 12000 kg tank moving at 8 m/s is broughtto a halt in 1.5 s by a reinforced-steel tankbarrier.What magnitude of the impulse was imparted to the tank?Answer in units of kgm/s.   PART TWO: What is the average net force exerted bythe tank on the barrier?Answer in units of N.