# physics

posted by
**ntirandekura**
.

Three carts of masses 5 kg, 12 kg, and 3 kg

move on a frictionless horizontal track with

speeds of 5 m/s, 8 m/s, and 4 m/s, as shown in

ﬁgure. The carts stick together after colliding.

5 kg 12 kg 3 kg

5 m/s 8 m/s 4 m/s

Find the ﬁnal velocity of the three carts.

Answer in units of m/s