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  1. The Physics Behind Fidget Spinners

    Dude Perfect is unreal!
  2. Wine Glass Resonance Fun

    Maybe I will try this sometime.
  3. Why We Can't Travel the Speed of Light

    My brain hurt from reading this too.
  4. Polar Bear Fun

    Optics is cool
  5. Car Tires

    Friction is very important for car tires.
  6. Physics of Fetch

    Interesting! Maybe I'll try that with my dog.
  7. How Micheal Jordan Jumps so high

    Micheal Jordan didn't get the nickname "Air Jordan" for nothing. He is known for his ability to jump really high in order to perform epic slam dunks. How does he do this? Micheal Jordan stands 1.98 m tall and has a wingspan of 2.13 m. A basketball hoop is 3.05 m high; therefore, he has to jump about .16 m above the ground for his hand to reach the rim. Jordan is most famous for his dunk from the foul line which is 4.57 m from the basket. In order for him to successfully complete this projectile, he must jump with an initial velocity of 25.31 m/s from the ground; 1.77 m/s in the vertical direction and 25.25 m/s in the horizontal direction. In order to produce this velocity he must push of from the floor with a force of 1454 N if he pushes off of the ground for .2 seconds.
  8. Physics of walking

    What makes us move? Well that's obvious. It's our feet, but how exactly does that happen. The answer is newtons third law of motion: when a force is applied to one object, that object automatically applies that same force back. When your foot presses on the surface of the earth at an angle, the earth pushes back on your foot with the same force causing your body to accelerate forward. You might say, well then why does the earth not accelerate. That's because the earth is so big compared to your body that the force that you push on the earth with is practically nothing. You can also tie this to conservation of momentum. If you and the earth both start at rest and a force is applied to accelerate your body, the earth body system's momentum is conserved.
  9. This was very cool! I've always wondered why that is.
  10. The Physics of Hitting Home Runs

    The MLB has recently gotten involved in the physics of home runs since they came out with stat-cast which tells us the launch angle, exit velocity and projected distance of the ball landing.
  11. What does Gary Sanchez Feel When Catching?

    Wow, that's really cool! Gary Sanchez is one of my favorite Yankees, but he does need some work behind the plate for next season.
  12. Basketball Fun

    I have noticed that many times while playing basketball and always wondered exactly why. This was very interesting to read and yes, it is crazy all that can happen in one instant.
  13. Work, Energy, Power Summary

    The last unit we studied in AP Physics C was Work, Energy and Power. First we reviewed the concept of work and how it equal to force*displacement. In a calculus based physics class however Work is also equal to the integral of force with respect to displacement. This means that the area under a Force vs Displacement graph is equivalent to the work done on the object. We also learned about Hooke's law and how it describes the relationship between the force of a spring and displacement. The slope of a graph of force vs displacement represents the opposite of the spring constant (k) of the spring. From this the equation Fs = -kx was determined. Then we analyzed the work energy theorem which shows that work is equal to the change in kinetic energy. Kinetic energy is the energy of an object that is moving. Potential energy is stored energy that an object has the potential to use. In a closed system energy is conserved. The total energy of a system is equal to the potential energy plus the kinetic energy. Power is a measure of the rate at which work is done, therefore power equals Work/time. From this we can also conclude that power is also equal to force*velocity. This unit will be helpful in many ways. It is an alternative to many kinematic problems and will also be helpful in other topics as well.
  14. Hubble Space Telescope

    The Hubble Space Telescope is a large telescope that was launched into space in 1990 and has been used to see images that were, before Hubble, too far to see. Just recently, on October 20th, Hubble captured an image of a twisted cosmic knot in the constellation cancer as shown in the image below. This is 250 million light years away. A cosmic knot is what occurs when two galaxies collide to form a new galaxy. This galaxy, NGC 2623, stretches approximately 50000 light years from end to end. When galaxies merge, star clusters begin to form which is shown by the specks of bright blue that exist throughout the twisted cosmic knot. These newly formed clusters are blue because the blue stars inside the cluster are much hotter than the other stars. As time goes on the clusters will change to red because the blue, hotter stars will die out faster. Hubble has been extremely useful in the world of astronomy for discoveries like NGC 2623 and many others. Its groundbreaking technology has helped us to significantly improve our understanding of the universe.
  15. Supersonic speed

    As I was scrolling through Instagram, I came across a post by Nasa that said today, October 14th, 2017, is the 70th anniversary of supersonic flight. Supersonic flight is when something is traveling faster than the speed of sound, which is 343 m/s. Of course for the past 70 years this has only been done by noncommercial planes. Well, Nasa is currently working on making supersonic flight a reality for commercial planes. That would mean that you can travel from New York to Los Angeles in 2 hours. Now it takes over 6 hours. Nasa has been researching shock waves, cruise efficiency, and the effect of sonic booms on the environment. Sonic booms are loud boom sounds caused by the waves of sound. It occurs when an object travels at supersonic speed. If Nasa is able to make this a reality in will revolutionize modern travel.

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