Jump to content

Dannyk17

Members
  • Content Count

    20
  • Joined

  • Last visited

Community Reputation

0 Neutral

About Dannyk17

  • Rank
    Member
  1. Dannyk17

    Archery

    we are starting the archery unit in gym and I was wondering what the physics we behind it. I did some research and I found some pretty cool stuff about it, I found that when aiming archers generally aim to one side of their target and the arrow straightens out during flight. the arrow is able to straighten out because the fishtail at the end of the arrow oscillates causing the arrow to move back towards the center.
  2. Dannyk17

    Skydiving

    I was watching television the other day and I saw a commercial of someone skydiving, this got me thinking that there has to be physics behind it. I learned that the physics of skydiving involves the interaction between gravity and air resistance. a skydiver keeps accelerating downward until he or she reaches terminal speed, the speed at which the air resistance on the skydiver equals the force of gravity acting on him or her.
  3. Dannyk17

    Frisbee

    I was at the park the other day and saw a few people plying Frisbee, and this got me thinking, just how does a Frisbee fly? I learned that once in the air the Frisbee's unique shapes allows to gain lift and angular momentum allowing it to stay in flight. I also learned that Newton's third law plays a vital role in a Frisbee's flight. the Frisbee forces air down and in turn the air forces the Frisbee upward.
  4. Dannyk17

    Harmonics

    we have been talking about sound waves a lot in class recently and how they are found in music. I did some research of my own and they really are. I learned how guitar strings have a specific frequency in which they will naturally vibrate and are known as harmonics. I learned that if a guitar only had a single frequency it would make only one sound but because it has so many harmonics present it is able to produce different pitches and thus different sounds
  5. Dannyk17

    Breaking glass

    in class we recently watch a Mythbusters in which they tested whether or not a human can shatter a glass with their voice. to my surprise they were successful, this sparked my curiosity for the topic. from looking into it I found that the singer wasw able to break the glass unassisted with a combination of matching the glasses natural frequency and by using the right level of amplitude for his own. I found that by enacting these two variables onto the glass the effect would be resonance. the singer's voice would cause the glass to vibrate so much so that the glass would shatter.
  6. Dannyk17

    Elevators

    seeing as how I always struggle with elevator problems so I decided to do an entry on them to help with my understanding of them. when accelerating upward in an elevator, a persons inertia wants to stay put so it results in a greater force between the scale and the person. because of this the normal force is larger and the weight is larger. when accelerating downward in an elevator, a persons inertia still wants to remain put so it results in a lesser force between the scale and the person. therefore the normal force is smaller and the reading on the scale is smaller.
  7. Wow Max, that's really kool! I wonder if the size of the spoiler itself has any affect the amount of grip?
  8. I hope your ankle gets better soon
  9. I really want to go to Disney now
  10. thanks, I'll make sure to be extra careful while driving in the snow now.
  11. Dannyk17

    walkin

    you walk everyday, and yet do you ever stop and think about what actually is going on while you're walking? if it weren't for the friction between your feet and the ground propelling you forward you wouldn't be able to go anywhere. Furthermore Newton's third law is greatly involved in the act of walking. Every step you take is responded by an opposite force coming from the ground, propelling you forward and giving you speed. this is why when you run you have to apply much more force to the ground in order to have a greater force pushed back at you.
  12. Dannyk17

    catapults.

    Through the many trials of creating our catapult, my teammates and I were able to discover the physics that went along with it. we learned that a catapult is able to launch its projectile through either three different stored energy mechanisms; tension, gravity, or torsion. we inevitably used gravity because we thought that it would be the most effective. we used a plastic crate full of bricks as our source of energy to launch the softball. But even though all the bricks greatly outweighed the softball it only managed to go 10 meters. After further analyzing the problem we came to the conclusion that our launch angle was far too great, we wanted it to be around 45 degrees but it ended up being much higher than that. because of this the projectile went pretty high but not very far. if we were to do this project over again we would definitely make our launch angle smaller to maximize the distance of our projectile.
  13. why am I not surprised to see this on your blog?
  14. Dannyk17

    soccer

    in many ways physics has a lot to do with soccer. for instance, when cutting while running takes a lot of force. Newton's first and third law of motion apply to this action. Newton's first law is applicable here because you continue moving in that direction until you exert a force(your plant leg) to change it. The third law works here because the force your foot is inflicting on the ground is counteracted with the same force but in the opposite direction by the ground itself.

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

×
×
  • Create New...