Physics: Viewer's Request: Mechanics #14: Gear Ratio of a Bicycle
HTML-код
- Опубликовано: 2 июл 2020
- Visit ilectureonline.com for more math and science lectures!
To donate:
www.ilectureonline.com/donate
www.patreon.com/user?u=3236071
We will solve: How far will the cyclist travel=? If” The pedal rotates 60 times, the wheel diameter is 70cm, the front sprocket has 48 teeth and the back sprocket has 18 teeth.
Next video in this series can be seen at:
• Physics: Viewer's Requ...
Your energy is strong love the lesson many appreciation 👌
Best thing ever to happen to engineering students
Glad you think so! 🙂
How do you do it to make a new video every few hours ? it's really impressive, I cant find the time to even watch them all. Great content and I always enjoy the ones I watch.
Wish there was a video out there on tire pressure and the effects on gear ratio. Like for a car or truck. There literally nothing on utube nor the web
We do have videos in the mechanical engineering section of this channel that show the effect of underinflated tires on the rolling friction.
Thank you this is a great starting point for a cycling video game I’m working on.
Glad it was helpful!
This amazing ❤thank you
This got me to figure out how to use my new biycle gears
Glad you found it useful. 🙂
Power watts applied to the pedals by the legs can vary. Inclined up/down or level? Coasting or not. … just a few more variables at play.
Yes indeed.
Great video I have been looking a lot for a good explanation thank you, people tends to think equations=algebra, this is a physics problem.
Thank you. Algebra is just a tool to be used in the execution of science and industry. 🙂
Tanks a lot for the clear explanation !
You are welcome! Glad you liked it.
Great video👍👍👍👍👏🏽
Thank you 👍
Hartly thank you very much
Always welcome
well, the 700c wheel has a CIRCUMFERENCE and the sprockets dictate the number of revolutions of the CIRCUMFERENCE
to a straight line on the contact point so its 700x3.14 (pi)= about 2.2 meters per revolution. Next take the teeth count and
divide the large with the small and that will tell you the number of revolutions which can be multiplied by 2.2. Take a 40/20t for 2 to 1, 2 times
the wheel's small gear to one of the crank gear and you ultimately get 4.4 meters of travel per crank revolution. Most low gear
ratios are 1.5 to 1 when beginning to pedal into forward motion and then higher ratios as speed is achieved and workload
diminishes keeping in mind it is on flat level path. On the high ratios 4 to 5 revolutions of wheel to one of crank are common, 13/53t= 4 to 1.
Nice input. Thank you.
I havnt found anyone that has addressed my quandry: Does each link on a bicycle chain remain under a load or are the only loadbearing links in contact with the sprockets. Also, it seems to me, that only 1/4 of the "pulling" sprocket is doing the pulling. Your thoughts?
Only the part of the chain that connects the front sprocket to the back sprocket at the top part only including the part of the chain that is warpped around both sprockets experiences the tension that pushes the bike forward. The bottom of the chain that returns from the back sprocet to the front sprocket does not experience that tension.
Are we using the gear ratios to account for the fact that we don't know the diameter of each sprocket?
Since the teeth have to be spaced the same distance (for the chain to work) the ratios will be the same
What do you think is better for university Mechanical or Material Engineering?I like physics more than chemistry so i don't know what to choose
I think Mechanical is a better bet, because Mechanical Engineering pretty much encompasses every field of Engineering and is broad enough to apply to other fields of Engineering. Materials Science is a specialized form of ME, and like Aerospace Engineering, jobs usually require masters degrees and above and has significantly less jobs than Mechanical Engineering does.
@@joeyGalileoHotto 👍
Bravo
Thank you. Glad you liked it. 🙂
Lovely but can you make other ones more complicated for clocks, machinery and cars?
Yes, that is one topic we haven't covered yet.
bedankt voor de video
Graag gedaan
My head hurts
No pain, no gain?
Hi sir, Suhabavan present from INDIA
a shark has 100 teeth, I have 32 teeth, if the shark chases me around in the water... how many Pleas for Help do I scream out? :D .. HAPPY 4th of July Michel and Wifey... and to your cats!!... :D ...
Wait what about units? You used centimeters and meters...
The centimeters were converted to meters in the equation used.
Hi sir, Omar present..........
my bike is 16teeth and 44teeth
Do you have gears on you bike?
@@MichelvanBiezen i dont know my bike is only single speed
Then that ration is chosen to produce a most optimum ratio for typical riding.
Prolly a bmx
You obviously are not a cyclist...better math breakdown and more algebra...where did 60 rpm come from?
On the contrary. I have ridden over 80,000 km.