A 0.42 kg object is at rest. A 2.40 N force to the right acts on the object during a time interval of 0.40 s. What is the velocity of the object at the end of this time interval? ​

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?