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Tag: olympics series

  • The Incredible Physics of Simone Biles’ Yurchenko Double Pike

    The Incredible Physics of Simone Biles’ Yurchenko Double Pike

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    A gymnast can actually perform both of these types of rotation at the same time—that’s what makes the sport so interesting to watch. In physics, we would call this type of movement a “rigid body rotation.” But, clearly, humans aren’t rigid, so the mathematics to describe rotations like this can be quite complicated. For the sake of brevity, let’s limit our discussion just to flips.

    There are three kinds of flips. There is a layout, in which the gymnast keeps their body in a straight position. There is a pike, in which they bend at about a 90-degree angle at the hips. Finally, there is a tuck, with the knees pulled up towards the chest.

    What’s the difference, in terms of physics?

    Rotations and the Moment of Inertia

    If you want to understand the physics of a rotation, you need to consider the moment of inertia. I know that’s a strange-sounding term. Let’s start with an example involving boats. (Yes, boats.)

    Suppose you’re standing on a dock next to a small boat that’s just floating there, and isn’t tied up. If you put your foot onto the boat and push it, what happens? Yes, the boat moves away—but it does something else. The boat also speeds up as it moves away. This change in speed is an acceleration.

    Now imagine that you move along the dock and pick a much larger boat, like a yacht. If you put your foot on it and push it, using the same force for the same amount of time as you did for the smaller boat, does it move? Yes, it does. However, it doesn’t increase in speed as much as the smaller boat because it has a larger mass.

    The key property in this example is the boat’s mass. With more mass, it’s more difficult to change an object’s motion. Sometimes we call this property of objects the inertia (which is not to be confused with the moment of inertia—we will get to that soon).

    When you push on the boat, we can describe this force-motion interaction with a form of Newton’s Second Law. It looks like this:

    Illustration: Rhett Allain

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    Rhett Allain

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  • A Self-Healing Pole Vault Pole Is One Great Leap for Sports Tech

    A Self-Healing Pole Vault Pole Is One Great Leap for Sports Tech

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    The Swiss company CompPair focuses on composites with the goal of making products more repairable. Its hallmark composites rely on what CompPair calls HealTech technology to create a healable surface. The way it works is that when something gets scratched or dinged, heating up the resins that hold fibers together could soften them and let them slowly seep back into shape.

    The process isn’t instant. Depending on the break it can take minutes, or sometimes a day or more. But once it’s done, the compound should be reset to almost as good as new. To be clear, this process has never been used in a vaulting pole. CompPair has tested its composites on mostly flat surfaces that are easier to control for. Getting those composites into a vault pole—while maintaining the integrity of the structural fibers—is a whole other challenge.

    CompPair cofounder and CTO Robin Trigueira says there is a world in which utilizing these kinds of composites could help usher in more repairable sporting equipment. Trigueira says he can envision a possible future where Olympic stadiums provide very long ovens that vaulters can place their healable poles in overnight to ensure they’re nice and sealed before event time.

    “I think it’s possible.” Trigueira says. “But we must test it thoroughly to learn something like this.”

    Self-Healing Future

    The trouble with using these composites inside something like a pole vault is that it is exceedingly complicated to make sure it solves the problem at hand. Adding a new composite because it is healable could also add a whole variety of new variables that could not mix well with the structural components of the pole. Adding a gloss on the surface to make cracks visible could change how the vaulter grips the pole.

    Every crack and divot is different, and may not heal the same depending on how it develops. There might be some damage that is too structural to melt away with a little bit of composite redistribution. Depending on the defect itself, it may take a long time to fix. Also, heating the healable resins might mess up the other composites.

    Trigueira compares the process to an injury on the body. If you’ve just got a scratch on your arm, you might not even bother to do anything about it, and it will heal quickly. But something deeper and more serious will take more time to figure out, and may lead to additional complications.

    “It’s very rare that you suffer the exact same injury as somebody else,” Trigueira says. “Is the part taking little scratches, or more deep wounds? This we need to know in order to be efficient in the healing.”

    The idea of using healable composites in poles is also not a new one. It has been around since at least 2017, but no healable poles have been created—yet. Rahrig says Essx isn’t currently working on any efforts to add such a healing resin or composite to its poles, though doesn’t discount that some day it might be utilized to make a longer lasting pole.

    “We’re investigating materials like this all the time,” Rahrig says. “That’s purely research level right now. It’s very interesting, but how it would be used in a pole, I’m not so sure.”

    Outside of Olympic competitions, pole vaulting has a smaller presence in the sporting world more broadly. There isn’t much money in pole vaulting, so it’s likely these kinds of materials will appear elsewhere first. Trigueira says CompPair is not currently working with any pole vault companies to put its composites in their products, but says it is working to implement them in more prominent sports equipment such as surfboards and bicycle frames.

    So while it may be some time before this sort of innovation graces the humble vaulting pole, both Rahrig and Trigueira say it’s both possible and likely. “In 10 years, I think, it’s a safe thing to say there would be a pole vault with healable composites,” Trigueira says.

    Correction: 07/26/24, 8:51 am: Clarified that CompPair is working on healable composites for bike frames, not bike pedals.

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    Boone Ashworth

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  • How to Watch the 2024 Summer Olympics

    How to Watch the 2024 Summer Olympics

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    If you only want to see highlights or don’t care about streaming specific events, there will be plenty of coverage available for free on NBCOlympics.com.

    If you live in the UK and you prefer to stream select events live or on-demand that aren’t available on the BBC’s player, your best option is Discovery+, which will be streaming every event at the Games. It’s running a special deal this summer that gives you access for £4 per month. There are also additional savings if you already pay for Sky TV.

    Read on for the specific timing of some of the biggest events. Just know that the times might change as the actual games play out. You can find the full schedule of events on the official Olympics website.

    Note: Unless specified otherwise, all times below are listed in US East Coast time.

    Opening Ceremony

    The four-hour-long opening ceremony will be broadcast by almost every Olympic media outlet live on July 26. It starts at 8 pm Paris time, which is 2 pm Eastern and 11 am Pacific. Most broadcasts will start 30 minutes before the ceremony begins.

    3×3 Basketball

    The three-on-three variant of basketball starts July 30 with men’s and women’s rounds. The medal matches are played on August 5.

    Archery

    Archery ranking rounds begin on July 25. The medal matches are on July 28 for the women and July 29 for the men.

    Badminton

    Badminton starts with both doubles and singles games on July 26. The finals are spread out over several days, from August 2 to August 5.

    Basketball

    There’s a ton of hoops to watch this year. Games start on July 27. The US men’s team plays its first game on July 28 at 11:15 am, and the US women play on July 29 at 3 pm. The gold medal games are on August 10 for the men and August 11 for the women.

    See the whole schedule.

    Boat Stuff

    • Rowing: Men and women’s single, double, and quadruple sculls heats start July 27. The medals matches are spread out between July 29 and August 2.
    • Sailing: Events start on July 28. Finals for all the categories—windsurfing, one-person dinghy, two-person dinghy, skiff, and mixed multihull—are spread out between August 1 and August 8.
    • Canoe/kayak slalom: Starts July 27 with men’s and women’s heats. Finals in all slalom events take place between July 28 and August 5.
    • Canoe/kayak sprint: Starts August 6, with finals on August 8, 9, and 10.

    Breaking

    New this year! Very exciting. B-Girls compete on August 9, and B-Boys throw down on August 10. Here’s the full schedule.

    Cycling

    • BMX freestyle: All events take place on July 30 and 31.
    • BMX racing: All events take place on August 1 and 2.
    • Mountain bike races: The women race on July 28 and the men race on July 29.
    • Road bike races: Men’s and women’s time trials are on July 27. The men’s road race is on August 3, and the women race on August 4.
    • Track: Track races start on August 5, with the medal races out between August 5 and August 9. Check out the Madison event, it’s wild.

    Diving

    Diving events are quite spread out. The events start on July 27 and go until the men’s 10-meter platform final on August 10. Here’s the full schedule.

    Golf

    Men’s individual rounds start August 1 and conclude with the medal round on August 4. Women’s rounds start August 7 with the medals on August 10.

    Gymnastics

    The official schedules for gymnastics are broken up into specific categories, each with their own schedule. Artistic gymnastics start on July 27, rhythmic gymnastics start August 8, and trampoline gymnastics take place entirely on August 2.

    Hockey

    Hockey in the summer? Yes—field hockey. Men’s field hockey starts July 27 with the finals on August 8. Women’s games start July 27 with the finals on August 9. Here’s the full schedule.

    Horses

    There are lots of equestrian events, from dressage and cross-country to jumping and grand prix. Everything starts July 27. Behold the full horse schedule.

    Martial Arts (and Miscellaneous Fighting)

    • Fencing: All the lunging, swiping, and parrying begins July 27. Full fencing schedule here.
    • Boxing also begins on July 27, with dozens of matches across all the weight classes. Here are all the boxing times.
    • Judo starts July 27. There are a bunch of weight classes in judo as well, so check the full schedule.
    • Taekwondo: Competition starts August 7 and ends August 10. Here’s the full list.
    • Wrestling takes place between August 6 and August 11. Here’s the full schedule.

    Soccer (aka Football)

    Soccer matches start early on July 24. The gold medal games are August 9 for the men and August 10 for the women. The full soccer schedule is here.

    Skateboarding

    Skateboarding is enjoying its second Olympics as an official sport, which is pretty rad. The street events are July 27 and 28, and the park events are August 6 and 7.

    Sport Climbing

    The new sensation of climbing up a wall is making its Olympic debut in Paris. All of the events take place between August 5 and 10. Here’s the full schedule for the various matches. Also be sure to read our interview with US climber Jesse Grupper about the gear he’s bringing to Paris.

    Surfing

    They have waves in Paris? Not really; the surfing events this year are being held at Teahupo’o, Tahiti, which is a French territory. Surfing events are mostly happening at weird hours because of the time difference. There will be some days where the surf is lousy, and they’ll just hold the heats on a different day if that’s the case. Check out the schedule, but just know that it will likely change.

    Swimming

    There are many swimming events, each with a different distance, stroke, and number of competitors. See the full schedule to find the ones you want to watch. There are medal matches nearly every day. And keep an eye out for the mayor of Paris.

    Tennis

    Tennis kicks off July 27, with matches every day leading up to the medal events for singles and doubles on August 2, 3, and 4. Here’s the schedule.

    Oh, and you’d like to watch some table tennis? There’s a schedule for that too, and you’ll need it. Table tennis spans the entirety of the Games, with matches from July 27 to August 10. The medal matches are on the last two days.

    Track & Field

    There are a variety of different track and field events that we now call athletics. These individual and team events—decathlon, high jump, hammer throw, and so on—take place from August 2 through August 10. You’ll need the full schedule to keep tabs on what you want to see.

    The men’s marathon is August 9, and the women’s is August 10.

    Triathlon

    Watch the great swim-bike-run effort. The men race on July 29, and the women race on July 30. The mixed relay is on August 4.

    Volleyball

    Indoor volleyball runs the whole length of the Games, from July 27 to August 10. The medal matches for men and women are on the last two days. Find your favorite country on the schedule.

    Beach volleyball takes place over the same time span—just at a sandier venue—and the schedule is stacked.

    Weightlifting

    These matches are separated based on weight lifted (i.e., how swole the athletes are). The heavy objects will be lifted from August 7 to August 11, with medals awarded every day. Here’s the full schedule.

    Water Polo

    Much like volleyball, there are water polo matches for the whole two weeks of the Games. Events start on July 27 and go to August 11. The women’s gold medal match is August 10, and the men’s is August 11.

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    Michael Calore, Boone Ashworth

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