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@maxberdik-blog
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
Our first day of service saw us in Canto Grande. This poor barrio (called a ‘pueblo joven’ in Peru) is on the outskirts of Lima. It is there that the Christian Brothers run a school called ‘Fe y Alegria 26’, one of a system of schools funded by the government but run by religious communities which...
On Monday we did a lab. This lab was to help us better understand IMA and AMA. We would used pulley systems to measure the efficiency. The more simple the pulley system was, the great the efficiency was.
Looks like an interesting lab. And when you say simple, do you mean smaller in size or simply less complex?
The Mars rover Curiosity is apparently doing well in its 8 month journey to the red planet. It has already begun monitoring space radiation as it travels, and will be conducting other various tests as it travels. Once it arrives on Mars, it will begin its mission of searching for possible life, or life that once was on the planet.
This is a pretty short and classic Bill Nye video. He explains many simple machines and how they work. He does not necessarily go into the physics of it all (because the video was intended for 3rd graders) but having basic knowledge of how these machines actually operate is still important.
On Wednesday we learned about Machines and Mechanical Advantage. It was initially pretty confusing to understand, considering I was not present for the lessons on Monday and Tuesday, but after further review in the textbook, things became a bit more clear. Mechanical advantage is simply the ratio of resistance force to the effort force in a system. It can be represented by the equation MA = Fe/Fr. Ideal Mechanical Advantage is equal to the displacement of the effort force, divided by the displacement of the load. It is represented by the equation IMA = De/Dr
This video helped me understand the difference between power and work and how force is used in every day life and the differences between kinetic and potential energy
pretty cool video, it helped me understand the world a little better. Check out the video I posted, it might help you out too. -Max Berdik
Homework for monday
I initially had some difficulty figuring out what to do to solve the first problem in this weekend's homework. It took some hard thinking and some searching the in reference table to find that for part a, I had to use the formula PE=kx^2. After finding the potential energy, I went on to solve for the velocity of the arrow by using the formula E=KE+PE. I'm pretty sure I did this right, but of course there is always room for error.
This is pretty silly video which simply explains Potential and Kinetic Energy. It really helps to simplify and get down to the basics of how the two energies work. I so far feel that this unit has not been too challenging, but of course this is subject to change. Hopefully it will stay fairly easy to understand.
This week we learned about Kinetic and Potential energy. Kinetic energy is energy if motion and Potential energy is energy with potential to have motion. The picture above shows a roller coaster moving along a series of hills. At the top of a hill, the coaster has potential energy, but not kinetic energy. As is moves down towards the bottom of the hill, its potential energy decreases and the kinetic energy increases.
In class of Friday we talked about Kinetic Energy and the Kinetic Energy Theorem. Kinetic Energy is the energy of motion. KE depends on an object's mass and velocity, hence its formula KE=1/2mv^2. The KE formula can also be derived to form the Kinetic Energy Theorem. Because W=Fd, and W=change in energy, we can assume that Fd=1/2mv^2. We must keep in mind that work is not equal to KE, but equal to the change in energy (work changes the energy).
On Friday we watched a video where a man jumped off a cliff and literally flew down the face of a mountain (see video). The video demonstrates many aspects of physics, like gravity, air resistance, mass, surface area, acceleration, distance, etc. It is amazing how Corliss is able to keep himself composed throughout the flight, because if he tucks his arms in too close to his body, his surface area will no longer be great enough to glide, and he will plummet to the ground.
That looks like so much fun. I wish i could try it.-Thomas Horner
What do you think would happen if he had too much surface area, you think anything at all? - Ryan kincheloe
I would think that his vertical velocity would decrease, but I'm not sure of the science behind it. -Max Berdik
Pretty funny video of a physics teacher rapping about how to "do work" in physics. Work can be calculated by using the formula W=Fd. Work is done against another force, which is why Newton's third law (Fg=mg) needs to be used in order to solve work problems every now and then. Work can only occur on an object if a the object moves a distance and if there is a force exerted on it. Therefore, if there is no movement, there is no work done.
Tomorrow we have a test on momentum, conservation of momentum, impulse, and work. Work can be calculated by using the formula W=Fd. So far, all of the material on this topic has been fairly easy. If there is one thing that may trip me up, it would be the derived units of calculating work. Hopefully the exam will not be too difficult and none of the free-responses will give me trouble.
Flying guy
In class when the juniors were away we saw a video of a guy seemingly shooting across the sky in a wing suit. At one point he crashed through a pair of balloons and broke them. It was a pretty cool way of showing how air resistance could keep him up. His velocity was so big the momentum must have been large and also the impulse would be large
I think the balloons were there not so that he could break them, but so he could know which direction to fly in. I would love to try something similar to what he does one day. -Max Berdik
On Friday we watched a video where a man jumped off a cliff and literally flew down the face of a mountain (see video). The video demonstrates many aspects of physics, like gravity, air resistance, mass, surface area, acceleration, distance, etc. It is amazing how Corliss is able to keep himself composed throughout the flight, because if he tucks his arms in too close to his body, his surface area will no longer be great enough to glide, and he will plummet to the ground.
Today we talked about elastic and inelastic collisions. The video above shows a perfect example of an elastic collision, when two objects collide with no energy loss. The two objects colliding will most likely bounce off each other. However, in an inelastic collision, some mechanical energy is transformed into heat energy. the two objects colliding will deform and most likely stick together.
