Car 1 has a mass of 65000 kg and moves at a veloctiy of 0.80 m/s. Car 2 with a mass of 92000 kg and a velocity of 1.2 m/s, overtakes Car 1 and couples to it. Neglecting friction, find the common velocity of the two cars after they become coupled.

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)