Physics, 10.11.2019 04:31 harleyloveless2853

Three identical boxcars are coupled together and are moving at a constant speed of 28.0 on a level, frictionless track. they collide with another identical boxcar that is initially at rest and couple to it, so that the four cars roll on as a unit. friction is small enough to be neglected. part awhat is the speed of the four cars? part bwhat percentage of the kinetic energy of the boxcars is dissipated in the collision? part cwhat happened to this energy?

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Three identical boxcars are coupled together and are moving at a constant speed of 28.0 on a level,...