Suppose Car A has 1000 units of momentum and Car B has 0 units of momentum (it's at
rest) before they collide. Which of the
following statements is true about Car A and
Car B after they collide, according to the law
of conservation of momentum?
Car A and Car B will each have 1000 units of
momentum.
Car A will now have 0 units of momentum and Car
B will have 1000 units of momentum.
Car A and Car B will have a combined (total)
momentum of 1000 units.
Car A will still
have 1000 units of momentum and
Car will still have 0 units of momentum,