Question

A 19.9 kg canoe moving to the left at 12.7 m/s
has a head-on collision with a 5.2 kg raft
moving to the right at 7.0 m/s. After the
collision, the raft moves to the left at 20.4
m/s.
Find the velocity of the canoe after the
collision. Disregard any effects of the water.
Answer in units of m/s

Answer 1

I got 7.04 but its not right

Answer 2

did you use the conservation of momentum formula?

Answer 3

M1V1i + M2V2i = M1V1f + M2V2f