In an elastic collision involving known masses and initial momenta, how many unknown quantities are there after the collision? How many equations are there? In a sticking collision involving known...

In an elastic collision involving known masses and initial momenta, how many unknown quantities are there after the

collision? How many equations are there? In a sticking collision involving known masses and initial momenta, how many

unknown quantities are there after the collision? Explain how you can determine the amount of kinetic energy change.