Materials that retain a lot of their kinetic energy are called elastic. What happens to the kinetic energy when a non-elastic substance (like clay) hits the floor?
BE CAREFUL: don't say that they kinetic energy disappears. That would be
breaking “The Law".

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?