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art blog(derogatory)
tannertan36
Janaina Medeiros
#extradirty
Cosmic Funnies
PUT YOUR BEARD IN MY MOUTH
Three Goblin Art
roma★
祝日 / Permanent Vacation
Xuebing Du
noise dept.
shark vs the universe
Aqua Utopia｜海の底で記憶を紡ぐ
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he wasn't even looking at me and he found me
Peter Solarz
DEAR READER
occasionally subtle
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@josesinqueso-blog
Scientists have developed a conceptual model of a device that would prevent sound from entering or leaving a certain area. This technology, if expanded, could protect users from eavesdroppers or even help neighbors sleep while there is a party going on. No more cop calls!
A team of researchers at the University of Illinois have created a system that can automatically fix a cracked circuit almost instantly. This technology has been used in concrete and polymers but using it in electronics could revolutionize how electronics are made and maintained. This technology may be able to be used to fix screen cracks one day. No more broken iPhone!
The pulley, as defined by Hero of Alexandria, is one of the five simple machines used to lift weights. A pulley consists of a wheel and a belt of some sort (string, rope, cord, you get the picture) and when an object is attached to it, the amount of force required to lift a weight is reduced by...
Interesting reference. Are these all of the ways that pulleys can be set up? Also of the five I would think that the three fold purchase pulley would be most effective, no? Nonetheless, pulleys are a very useful tool. Nice catch.
The Large Hadron Collider has discovered a new particle called Chi. It is a boson, basically a sub-atomic particle made up of its quark and its anti-quark. This particle is maintained by the same force that maintains the nucleus inside of atoms.
This photo shows how a yo-yo works. It is interesting how things we learn in Physics apply to the most obscure of actions. Without knowledge of kinetic energy, one would never know what propels a yo-yo.
Makes Me Wonder
I was just remembering a moment from my time in Mexico when I came to an impasse that involves physics. In Colima, I sat in the back of a pick up truck. So did several other people. If we all succumbed to centrifugal force, would we create a force that has an effect on the truck or one that creates an equal and opposite reaction that would be where the centrifugal force is supposed to be???… (food for thought)
I would think that it would be an equal and opposite reaction. Actually, scratch that. Centrifugal force is not a real force. Therefore there is no equal and opposite force. You will just fly off the truck.
Billiards
Today I was playing pool and thought about energy. Every ball on the table has equal potential energy. However depending on the force applied to the ball hit the kinetic energy of the system changes drastically.
Energy
The equation for energy is E=PE+KE. This means that in a closed frictionless system an object's total energy is always conserved. This means that if a car has x PE and y KE it will continue traveling, even against gravity as long as there is surplus PE
This picture of a dog pulling is a practical application of kinetic energy. The dog is using kinetic energy when moving away from the person holding the leash. This is why when you hold a dog's leash at a shorter length it is harder for the dog to break free. The greater the distance the dog can move freely the greater the velocity and therefore the greater kinetic energy. Moral of the story: Use a short leash!
A bow makes a good example for a lot of things in physics. The bowman does work when he pulls back on the string. Before the release, there’s a lot of potential energy being stored. This all becomes kinetic energy when the bow is released.
When the bowman pulls back on the string he is using kinetic energy yes? If so I think it would make sense that this kinetic energy is stored as potential energy in the bow and becomes kinetic energy again in the arrow as it flies. It's a cool application of theory in that the man has great mass and little velocity to make kinetic energy and it becomes kinetic energy in the form of little mass and great velocity in the arrow.
Kinetic Energy
The equation for kinetic energy is KE=.5mv^2. This is the energy an object has when it is in motion. That said, velocity has a greater effect on KE than mass. That is why a bullet fired from a gun has greater KE than a car. The bullet weighs much less but it moves much more quickly.
Doing work, like a boss. Credit to Matt Turchioe for the video.
All this talk about surface area made me think about this video i saw of guys speedflying. Speedflying is a combination of skiing and paragliding. The large surface area of the parachute allows the people to slow their descent and utilize air resistance to control their flight
Dude this video is insane! But if the wind picked up wouldn't their speed increase? While the large surface area and air resistance allows them to slow down, I think that a strong enough gust of wind would speed their descent no?
Ran in my first track meet ever today. After running I realized that centripetal force was what prevented me from flying into the wall coming around the turn. It's really cool to see a real world application of things we learn in class, such as centripetal force
Momentum
If in an elastic collision no energy is lost to the environment, is it possible to have a truly elastic collision in the real world? Even if you collided two elastic materials such as rubber balls, wouldnt air resistance cause a loss in momentum?
With simple (well rather complex) physics this man has determined that 39 sheets of bubble wrap would sufficiently break a person's fall from a second story window. Moral of the story: keep your bubble wrap around, you may need it to save your life one day.
Last week we did a lab that involved kinetic energy. Kinetic energy describes energy in motion, while potential energy accounts for stored energy. An example of potential energy is when a person jumps on a trampoline and the trampoline stretches. Kinetic energy is present when that person is launched into the air. This picture shows a bow and arrow. When the bow is drawn, there is a great deal of potential energy present. When the arrow is released, there is a great deal of kinetic energy.
Good example. I was thinking of other examples and came across something puzzling. Does an increase in momentum necessarily mean an increase in potential energy?
