14.3.18
On the horizontal section of the road, two cars are moving, the masses of which are m1 = 6 · 104 kg,
M2 = 2 · 104 kg and speed v1 = 1 m / s, v2 = 3 m / s. The second car catches up with the first and mates with
Him. Disregarding the resistance to movement, determine the speed of the cars after the clutch.
(Answer 1.5)