Tesla's Cybertruck Tug-of-War Stunt Was Pointless

author Engineering Explained   2 mounths ago

Here's Why Tesla Cybertruck Towing A Ford F-150 Is Meaningless
A tale of physics, electric trucks, and why tug of war doesn't matter.
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During the Tesla Cybertruck reveal Elon Musk showed the world that the Cybertruck can pull a Ford F-150, uphill! At initial glance, you might think wow, that's an impressive feat. Surely the Tesla's electric torque helps it rip the F-150 in this battle of "who's got the bigger driveshaft?" Unfortunately, physics informs us these kind of demonstrations are entirely pointless.

We'll discuss the actual wheel torque of the Tesla Cybertruck as well as the Ford F-150, we'll look into both vehicles weights, and we'll analyze the video to determine if the Ford is RWD or 4WD. Ultimately, we'll all land on the conclusion that everything we witnessed was pointless. That's the story of life. Enjoy!

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Ever wonder what the upper limit of the shot put is? The record is 23.12 meters, or just under 75 feet. But could someone come along and put one even further? WIRED's Robbie Gonzalez met up with Olympic record holder Ryan Crouser to find out why putting a shot 24 meters is Almost Impossible. Still haven’t subscribed to WIRED on YouTube? ►► http://wrd.cm/15fP7B7 Get more incredible stories on science and tech with our daily newsletter: https://wrd.cm/DailyYT Also, check out the free WIRED channel on Roku, Apple TV, Amazon Fire TV, and Android TV. Here you can find your favorite WIRED shows and new episodes of our latest hit series Tradecraft. ABOUT WIRED WIRED is where tomorrow is realized. Through thought-provoking stories and videos, WIRED explores the future of business, innovation, and culture. Why It's Almost Impossible to Shot Put 24 Meters | WIRED

Spinning objects have strange instabilities known as The Dzhanibekov Effect or Tennis Racket Theorem - this video offers an intuitive explanation. Part of this video was sponsored by LastPass, click here to find out more: https://ve42.co/LP References: Prof. Terry Tao's Math Overflow Explanation: https://ve42.co/Tao The Twisting Tennis Racket Ashbaugh, M.S., Chicone, C.C. & Cushman, R.H. J Dyn Diff Equat (1991) 3: 67. https://doi.org/10.1007/BF01049489 Janibekov’s effect and the laws of mechanics Petrov, A.G. & Volodin, S.E. Dokl. Phys. (2013) 58: 349. https://doi.org/10.1134/S1028335813080041 Tumbling Asteroids Prave et al. https://doi.org/10.1016/j.icarus.2004.07.021 The Exact Computation of the Free Rigid Body Motion and Its Use in Splitting Methods SIAM J. Sci. Comput., 30(4), 2084–2112 E. Celledoni, F. Fassò, N. Säfström, and A. Zanna https://doi.org/10.1137/070704393 Animations by Iván Tello and Isaac Frame Special thanks to people who discussed this video with me: Astronaut Don Pettit Henry Reich of MinutePhysics Grant Sanderson of 3blue1brown Vert Dider (Russian YouTube channel) Below is a further discussion by Henry Reich that I think helps summarize why axes 1 and 3 are generally stable while axis 2 is not: In general, you might imagine that because the object can rotate in a bunch of different directions, the components of energy and momentum could be free to change while keeping the total momentum constant. However, in the case of axis 1, the kinetic energy is the highest possible for a given angular momentum, and in the case of axis 3, the kinetic energy is the lowest possible for a given angular momentum (which can be easily shown from conservation of energy and momentum equations, and is also fairly intuitive from the fact that kinetic energy is proportional to velocity squared, while momentum is proportional to velocity - so in the case of axis 1, the smaller masses will have to be spinning faster for a given momentum, and will thus have more energy, and vice versa for axis 3 where all the masses are spinning: the energy will be lowest). In fact, this is a strict inequality - if the energy is highest possible, there are no other possible combinations of momenta other than L2=L3=0, and vice versa for if the energy is the lowest possible. Because of this, in the case of axis 1 the energy is so high that there simply aren't any other possible combinations of angular momentum components L1, L2 and L3 - the object would have to lose energy in order to spin differently. And in the case of axis 3, the energy is so low that there likewise is no way for the object to be rotating other than purely around axis 3 - it would have to gain energy. However, there's no such constraint for axis 2, since the energy is somewhere in between the min and max possible. This, together with the centrifugal effects, means that the components of momentum DO change.

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