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ZZ

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ZZ last won the day on January 19

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  1. Time of Launch: 10:52 AM Team members present: Ethan Smith, Zach Zlotnick Play by play: The rocket was launched with the boosters and accelerated to around 300 m/s. A gravity turn was executed to give the craft a parabolic path and it was ensured that the heading of the rocket lined up with the velocity vector so that torques exerted by air resistance was minimized. This gravity, which turned into something that was anything but “slight,” eventually caused a major disproportion in the balancing of CW and CCW torques. Our rocket, as can be observed in the screenshots, ende
  2. Team Name: ZZ Smith Research Available Funds: 51,059 Vehicle Name: S.A.D. Vehicle parts: Part Quantity Price TT-38K Radial Decoupler 3 600 MK1 Command Pod 1 600 FLT 400 Fuel tank 4 500 Stack Decoupler TR 18 A 2
  3. ZZ

    Bicycle Kicks

    The other day I was watching a soccer game, West Ham United vs Arsenal FC. I know I do blogs on soccer all the time but it's because I am just so fascinated by the things these players are able to do, hence why they are professionals. One of the players, Andy Carroll scored a bicycle kick, where a player flips himself/herself upside down with their foot in the air and kicking it over their head (sometimes referred to as an "overhead kick"). While this one was good, it reminded me of one from several years ago that another professional, Wayne Rooney performed in a game. Here's the video:
  4. ZZ

    Kobe Jumps a car

    In my previous blog I discussed the physics behind Kobe jumping a pit of snakes, which I believe is legitimate (or at least physically possible). Now I'd like to discuss another instance of Kobe's famous athleticism: him jumping over a car moving towards him. This one seems fake to me in theory because the consequences of the stunt are too much to warrant him doing it. However, I still think it'd be cool to think about the physics of it. This one is definitely faked. If you were to scale Kobe like in the previous video and analyze the motion. His acceleration was -6.76m/s^2. Thi
  5. Kobe Bryant just retired after 20 years at the Lakers. As a player straight from high school into the NBA he has set many records and is arguably one of the best basketball players of all time. One thing that him and other basketball players are known for is his jumping (which might not be as good as it was 10 years ago). I figured this would be as good a time as ever to analyze his jumping skills in two videos - one of him jumping a pit of snakes and dunking a ball, and of him jumping over a car (in my next blog post). Many believe that neither were real, so I'd like to discuss the physics of
  6. ZZ

    Spitballs

    So the other day at lunch when a couple of us were spitballing ideas for blogs, I figured what's better topic than spitballing itself. To test the physics of this I took a straw from the lunchroom and a smaller one from a different chocolate milk container of mine, with a similar radius. I blew projectiles (not at anyone) and found that the larger straw sent them further and faster than the shorter one. This is most likely because the longer the force I exerted on the spitball was, the larger the impulse (change in momentum) it would feel. The longer a force is applied on an object, the faster
  7. Yesterday I was watching soccer on TV and saw Ronaldo notch a hat trick...yet again. However, I rather began to ponder the physics behind being a goalkeeper to stop shots - maybe not as perfect as Cristiano Ronaldo's. Physics can separate the good from the great goalkeepers. Here are some factors in being a good goalkeeper: 1. Momentum- A goalkeeper must have his/her weight shifted forward, standing on their toes. When a shot comes, the goalkeeper will try to save the ball while moving forward. Therefore, due to conservation of momentum, they will deflect rebounds away from the goal
  8. ZZ

    Stuck in a "Pickle"

    Recently I've had a little bit of a pickle fetish. However, one of the things that is inevitable for us regular pickle-eaters is the difficulty in taking of the lid of the jar. One tip I have is to run the jar under hot water. This way the lid will become easier to turn. This is because metal has a higher coefficient of expansion than glass does. Thus, as the jar stays under the hot water, the metal expands a tiny bit, and the glass stays the same (I also find it easier to use my left hand because it's easier to turn CCW with your left than your right). The other tip I have would be
  9. ZZ

    Water Skiing

    Like many other students, I am looking forward to summer. One activity many people enjoy is water skiing! Water skiing has a lot of physics involved. The basics are essentially based on angles and gravity. When you get up from the start, your ski must be at a certain angle so that the water pushes down on the ski, creating a downward force that enables you to stand up (otherwise you'll just fall flat on your face). Once the forces up from the water and down on the ski are equal, you're set for takeoff! Tension, a pulling force, is also involved when the skier holds on to be pulled by the
  10. ZZ

    Mousetrap

    The other day I went to do my weekly chores, one of which was picking up and setting new mouse traps if needed. It turns out that today was an unlucky day for a certain rodent. I grabbed myself a new mousetrap after cleaning up the carnage from before, and began to set it. Now that I've set many before it does not seem too hard anymore, but it still requires a lot of care when handling one, since it could seriously injure an appendage if set off accidentally. I thought about it and realized that a mousetrap is really just a balancing act with equal torques on each side (F*r = F*r). The way a m
  11. ZZ

    A Purrfect Landing

    Once upon a time, in a school far far away, Mr Muz told us that a cat has a natural ability to be able to land from a building without dying. I figured, "if there's no physics explanation to this phenomenon that would be shocking." What confused me the most wasn't the landing, because cats can get injured from the stress put on their legs from extreme distances, but how the cat can maneuver its body in the air so quickly and that it lands on its feet. This is something humans cannot do without defying the laws of angular momentum. Let's say on a trampoline I try a flip; there's no way for
  12. ZZ

    Crazy Magnets

    Recently while fishing for some blog-worthy material I stumbled upon one of my favorite youtube channels that posts cool videos on all sorts of sciency stuff. Since magnetism is not the most heated of debates amongst us students for some odd reason, I figured a video on magnetism might spice things up a bit for me. I learned about a whole new type of manufactured magnet that I thought would look really interesting to a technology guy like me. Now we all know about magnets, right? One end is south and the other is north. You can use put your failing grades from physics and calc tests (at
  13. ZZ

    Pizza Tossing

    Pizza tossing is something that looks absurd at first - throwing dough into the air and spinning it around like a basketball on your finger. As it clearly takes a lot of skill, it also possesses several aspects about physics. Most obviously the pizza is given a centripetal acceleration of v^2/r and a force of mv^2/r and it can be treated as an object in uniform circular motion. The most ideal motion for a single toss is a spiral trajectory. When this dough is at rest the tosser must apply a torque to give it an angular acceleration (Aang = Torque/Inertia). The ideal motion of multiple to
  14. ZZ

    Slingshots

    Something I used to love using as a kid was a slingshot. It's so fascinating that a mechanism as simple as one of these can shoot something so fast. I thought I'd go through some of the physics behind this. As the elastic band is stretched, the potential energy stored is similar to that of a spring. However, the longer you take to aim the slingshot, the more potential energy you lose due to heat loss (aim fast!). If you happen to be making your own slingshot you would think that using a thicker band would have a higher spring constant and thus a larger exertion of force on whatever object
  15. ZZ

    Badminton

    One sport other than soccer that I feel I have a skill set in is badminton. It may look somewhat easy to a first-timer but there is a lot of strategy involved as well as skill obviously. Badminton is one of the fastest sports there is, faster than soccer, tennis, and even baseball. Usually it is played indoors, if played as an official sport, since the birdie can be very easily manipulated by the weather conditions. There are four basic shots: A smash, clear, drop, or drive - all of which should be used in distinct scenarios. This shuttle, or birdie, is very unique because it is designed
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