Question

When an object with a momentum of 80 kg ´ m/s collides with an object with a momentum of –100 kg ´ m/s the total momentum after the collision is ______.
a.
20 kg x m/s
c.
20 kg x m/s2
b.
-20 kg x m/s
d.
-20 kg x m/s2

Answer 1

what do you think?

Answer 2

momentum adds vectorially.
Translation: total momentum after collision=80-100=-20 kg m/s.