Force+and+Motion

1) We'll get things going here soon. Actually, the first thing I want you to do is to describe in detail a sport that you play and the actions that you take in that sport. (i.e. soccer; kicking the ball; my foot comes back, I swing my leg forward leaning to one side, I thrust all my strengths into the ball, etc.)

In baseball when I throw the ball, I have to put my weight on my back foot, then bring my arm back. Then I bring my arm forward with as much thrust as I can, transfering my weight to my front foot.

When I am up to bat I pull my bat back and with as much strength as I have, I accelerate my bat through the strike-zone, hopefully hitting the ball. If I hit the ball it is usually is a line drive, and gravity brings it down in the outfield.

When I am in the outfield chasing down a pop-fly, I have to run at my top speed to get over to the ball then usually I have to slow down, stop, balance my weight, and catch the ball in my glove.
 * Nicely Done! We'll use this as we continue.**


 * We're going to shift this conversation over to the astronomy page so look there first for the next step. You can post force and motion questions here though (if you like).

BC**

Newtons first law is manifested in our universe, in many ways, but the example I picked is a rocket on a launch pad. The rocket is at rest while it is sitting on the launch pad, but when the engines ignite, the compressed gas in the tanks rushes out of the rocket in the form of thrust because of pressure. That is the unbalanced force and the rocket is able to take off.

My example for Newton's second law is that of a bullet and a gun. When the bullet is shot, it rapidly accelarates and makes the shooter feel a kick, or recoil. Since F=ma; F=m(bullet)a(bullet acceleration) and F=m(gun)a(gun kick), we can combine them together getting m(bullet)a(bullet acceleration)=m(gun)a(gun kick).

My example for Newton's second law is that of stepping off a small boat. When you step off the boat wants to go in the opposite direction of whatever you are trying to step on to, leaving you to componsate.

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1) Let's take a look at your book again when I see you and we'll continue your way through the book. Lets not work through the book so quickly. For now I would like for you to describe how Newton's Laws as well as density, velocity, and gravity are manifested in the universe. (i.e. what are the structures in the universe that show the affects of gravity or high rates of speed?) Try talking about red and blue shift again. Can you give me three examples to start with? Post your answers to the force and motion page. Newton’s first law is manifested in our universe, in many ways, but the example I picked is all of the comets. The forces on it are never balanced, that it why it is going around the universe until it collides with something big.  My example for Newton’s second law is that of the craters of the moon. The craters are there because they were cause be a force F=a(meteoroid/comets acceleration) mass(the meteoroid/comet) Newton’s third law is manifested in the universe also in the moon’s craters. The comet or meteoroid caused the indent in the moons surface because when it hit the moon, it pushed the soil outward (in the opposite direction of the impact). Density is manifested in the universe along with gravity in a lot of different things. For example, unless a body/mass is dense enough the vacuum of space will overcome the power of gravity, pulling the body/mass apart. Velocity is manifested in the universe with gravity also. For example, if the velocity of the moon orbiting around the Earth became to high, then the Earth’s gravity would be overcome and the moon would be launched into space.