Views : 31,152,780
Genre: Science & Technology
Date of upload: Mar 2, 2024 ^^
Rating : 4.902 (23,621/940,762 LTDR)
RYD date created : 2024-05-03T01:35:11.613235Z
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Top Comments of this video!! :3
Regarding the backpack: when you study vibrations in engineering, you learn that there's a specific frequency in which you can vibrate a spring-mass system where it will not transfer that movement to the mass. That's why there's a "sweet spot", and all the people in the commercials were running with that sweet spot frequency, where the backpack barely moved even while they were running (i.e. the movement of the person was barely transfered to the backpack). This depends on the spring constant of the springs used, and on the mass of the system (the backpack and whatever's inside it). So if Mark were to put more weight in the backpack, he'd have to find a different running frequency in order to get the same effect.
Thanks for sharing all these cool experiments and knowledge with us, Mark! You're awesome!
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That backpack reminded me, if you walk with your drink, the equal frequency of your steps is building up waves in the mug, so ultimately you spill it. I do my "silly walk" with unevenly distributed steps and it truly helps make my way without spillage. With that walk I basically create waves that go against the waves I already created in the mug, mimicking how active noise cancelling works in ANC headphones.
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@MarkRober
2 months ago
You now know 7 amazing new things and that’s cooler than magic! Get the CrunchLabs Build Box with two FREE boxes here- crunchlabs.com/teaser
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