A billiard ball is shot west at 2.6 m/s. A second identical billiard ball is shot eas...

a) What is the velocity of the second ball?

b) If the second ball has a mass of 0.15 kg, what is its kinetic energy?

c) True/False: The total momentum of the system is conserved.

d) What is the displacement of the first ball after 4 seconds if no external forces act on it?