Solution of task 14.3.18 from the collection of Kepe OE

Solution of task 14.3.18 from the collection of Kepe OE

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)