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He was now looking forward to his physics lecturer telling him about the physics of transport. Reg proposed to ask what similarity there was between moving trains on railway tracks and snow crunching underfoot. It was something to do with traction and slip, he understood, but he was interested in how the lecturer approached it.Surprisingly, the man was up to the challenge, when Reg asked this at the end of the lecture.“Mr Robertson, the question boils down to two opposing forces: Friction and slip. In the case of trains, the friction between wheel and rail – two steel surfaces – is very small, so the force needing to be applied to make the wheels turn is relatively small. This why rail transport is so efficient.Applying a much greater force causes the wheels to slip, and this is observable when a steam engine starts up too sharply. The wheels spin and then catch again, so the engine driver has to lower the motive force to allow traction to take place with this level of friction.In a. The simple fact that the whole project had been his idea to start with wasn’t sitting all that well with him either. Looking over to their download device Kimison felt he wasn’t smart enough yet. Sighing he waited for an hour after Rayburn had gone to sleep; and then running through all the adjustments that Rayburn had made.Taking a deep breath he donned the head set again almost expecting pain as the program started.“Sir I thought you weren’t going to use this again,” Tempro told him a moment later.“I wasn’t but I can’t seem to grasp enough to solve the problem. I mean I can feel the answer there but it eludes me each time, I need to do this. I feel I am at my limit now though I have brought you here as a guide. I really need this Tempro or I might never be able to help Rayburn to finish everything.” Kimison told Tempro with a sigh. “I have to Tempro; I have no choice I am of no use like I am.”“I can understand much of what you have said, sir, though the risks to me seem to outweigh.
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