Jake+Minnich

//**__Red Bull Space Jump__**//



Felix Baumgartner

__**Mass:**__ The mass of an object is the quantity that can be found inside it. Mass is important because that will tell us how much something weighs. In the photo of Felix we see that his mass has an effect on him because that will tell us how fast he will fall and how quickly he should use his parachute. __**Gravity:**__ Gravity is a force that is exerted from an object such as the earth towards an object such as the human. Gravity tends to pull objects toward the center of that object. Like the sun pulling the planets around its gravitational pull. In the photo of Felix you aren't able to see gravity but you can tell that it is acting upon it because instead of continuing to fly up into the air, he continues to drop towards the earth's surface. Gravity is always at a constant acceleration of about 9.8 m/s. __**Speed and Velocity:**__

Speed is the rate of how fast an object is moving at a given time. Speed is also thought of as the rate that a certain object covers a distance in a given time. Velocity is a rate at which an object changes its position. Meaning that how fast an object changes its position from still to moving. In the photo you can see both speed and velocity because you know he is going to start to accelerate because he is dropping towards the Earth and also velocity because he was at one time standing still until he dropped towards the surfaces.

__**Air Resistance:**__ Air resistance or "drag" depends only on velocity and act towards the opposite motion that object is making in the air. As you can see in the photo below as thrust moves towards the left the air resistance is going opposite of that force towards the right. In terms of Felix air resistance is a huge part of this because if he didn't use the parachute and the air resistance didn't have an effect on him then he would have just crashed into the Earth's surface and wouldn't survive so its important that the parachute was there to pick up the air resistance. References http://www.universetoday.com/73315/what-is-air-resistance/ http://formulas.tutorvista.com/physics/air-resistance-formula.html http://www.physicsclassroom.com/class/1dkin/u1l1d.cfm http://www.thefreedictionary.com/gravity