Two different chains of cars (attached to each in a row) are driving uphill (Only the first car is motorized): The first chain consists of 3 cars, each 4000 kg. The second chain consists of 3 cars, the most front one being 8000kg and the others 2000kg each. Thus, meaning that the total weight is equal for both chains, but the weight is distributed differently.
For which chain will it be the easiest to drive uphill?
Somehow I think it has something to do with the c.g. or c.o.m or friction.. but i can't come up to a logical explanation.
Note: I received the questions exactly as I present them here from the organization I got them from. Therefore, I suffer from not being able to provide more context and specifications. I am only being able to provide my assumptions based on my preliminary knowledge.
Thanks in advance for the assistance!
The FBD I draw for the "8000,4000,4000" chain