A railroad car moving at a speed of 3.20 m/s overtakes,collides, and couples with two coupled railroad cars moving in thesame direction at 1.20 m/s. All cars have a mass of mass 1.10 105kg. Determine the following.
(a) speed of the three coupled cars after the collision____(Give your answer to at least two decimal places.) m/s
(b) kinetic energy lost in the collision ___ J
2. A cue ball at rest on a frictionless pool table is hit deadcenter by a pool stick, giving it an impulse of +0.55 N · s. Theball slides (the combination of hitting the ball dead center and nofriction allows this to happen) along the table and makes a head-onelastic collision with another pool ball. If both pool balls have amass of 0.166 kg, determine the velocity of the second ball theinstant after the collision. (Indicate the direction with the signof your answer.) m/s
