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Dear Prof Scott

As compared to Bicycle, more strength will be required for tricycle to drive in the Mountains?.

Thanks

Prashant

Hey, that's a key subject of mine, since I ride my 15 speed (or at least I rode it up into my

40's, but haven't ridden it since I turned 50). Because I used to ride it a lot (at least 5 miles a day in my 20's), I know a lot about them. It all comes down to instantaneous work and overall work.

Just like the champion weightlifters, we can all lift over 200 kilos. The only difference is that the really good weightlifters can do it in one time, whereas you and I would require multiple times. What I mean is we may lift 20 kilos 10 times, and that would be that same, but it won't get you on a weightlifting show. Now about lifting that much weight, do a search on "lifting 200 kilos." One of them is at www.youtube.com/watch?v=0qGYqC9W6ns,

Another is https://www.bing.com/videos/search?q=200+kilos+lifting&FORM=VIRE3#view=detail&mid=DB50DD18D23DB532766ADB50DD18D23DB532766A

Another interesting one is https://www.bing.com/videos/search?q=200+kilos+lifting&FORM=VIRE3#view=detail&mid=803D077F32B1D7BE9F38803D077F32B1D7BE9F38

Yes, there will be more strength required of the rider to instantaneously run a tricycle in the mountains if it can be done at all. There will be less strength required for the overall time it is done, but mustering the instantaneous strength to do it at all can easily be impossible. The main difference between them is in the bikes for older people have what are called gears.

A multi-gear bicycle is easier to do because it can be shifted down to a lower gear. Shifting down will require more overall work, but it makes the instantaneous work required much smaller.

It can be thought of to be just like a car. Sometimes when climbing hills, the motor needs to be shifted down to low to make the mountain climbable. Looking at the overall affect, however, it requires more gas to do this work in the long run. The reason this is done is shifting down allows the driving to be done without overheating the engine.

It is also similar to a pulley. When looking at the entire process, there is more work required in using a pulley from the start to the end. The reason they are used, however, is that the work required instantaneously is reduced and can easily be done.

Another thought is this is like carrying in groceries from the car to the house. To do it in high gear would be like doing it all at once. To shift down is like carrying multiple trips. Reducing it to carrying one bag at a time makes the job really easy to do in each instant, but in the long run, it requires more energy to be spent overall.

Lets get back to the tricycle in the mountains. On some of the hills I've biked up, I myself wouldn't have been able to ride a tricycle up them because it required to much instantaneous work. Using my bike (a 10 speed), in college it was my object to go up the steep hill in town by seeing how high of a gear I could keep it in. At first I used 1st gear, but on the way up, I shifted into 2nd and then into 3rd. Over the next few years I was there, eventually I got to the point of keeping my front gear in the high range (on a ten speed, which is 6th-10th instead of 1st-5th) and believe I might have actually ridden up that hill in 8th gear, maybe more, but that was over 30 years ago. The farthest I've ever ridden is 50 miles (with minor hills).

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Comment | Dear Prof Scott Thanks. Thanks & Regards, Prashant S Akerkar |

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