A 1500 kg car traveling at 17.6 m/s to the

Question

south collides with a 5000 kg truck that is
initially at rest at a stoplight. The car and
truck stick together and move together after
the collision.
What is the final velocity of the two-vehicle
mass?
Answer in units of m/s

Answer 1

momentum before = (1500) 17.6

momentum after = (1500+5000) v

momentum after = momentum before

Answer 2

So basically 1500 * 17.6?

Answer 3

huh?
(1500)17.6/(1500+5000)

Answer 4

when the little car hits the stationary big truck, it slows down.

Answer 5

Yes, I got it. Thank you