Space X(Space Exploration Technology): is the first company to ship private cargo to the International Space Station using its own rocket and spaceship, the Dragon. The company is one of two funded under NASA’s Commercial Crew program SpaceX is firmly focused on developing technology for future space exploration.
Background:
Elon Musk is funder, and also a CEO of the Space X .The first private company to ship cargo to the International Space Station in 2012. Musk firmly believed that more frequent and more reliable launches would bring down the cost of exploration. And Musk has publicly talked about ventures such as building a greenhouse on the Red Planet and more ambitiously, establishing a Mars colony. He also is rethinking transportation concepts through ideas such as the Hyperloop, a proposed high-speed system that would run between major cities.
Goals of SpaceX , Dream of Mars:
“The idea was to send a small greenhouse to the surface of Mars, packed with dehydrated nutrient gel that could be hydrated on landing. You’d wind up with this great photograph of green plants and red background — the first life on Mars, as far as we know, and the farthest that life’s ever traveled,” he said. He wanted to have a little greenhouse to keep the plants alive on Mars.
he sketched Space X plans to establish a Mars colony, along with other entities, with 80,000 people living on the Red Planet in 2012.The settlers would live off the land as much as possible, using equipment to generate methane, fertilizer and oxygen from Mars’ atmosphere and subsurface water ice.
Therefore, Musk’s goal is they want to set up life on Mars.
https://www.youtube.com/watch?v=AYdz9sqXQ28
In this short video, Elon Musk and others who work at SpaceX are interviewed about being part of this effort to bring life to Mars.
SPACEX’S USE OF ENERGY AND FORCE CONCEPTS
Gravity
Anything with mass has a gravity field that extends to the far reaches of the Universe. (one post that post in the space x wed site, named Background on Tonight’s Launch. This post is deeply describe how Gravity work in the space and explain the gravity is the reason that “escape velocity” is needed to escape the Earth’s orbit. )
Velocity
The velocity have important part that relate to gravity. it seems that the astronauts who are on the space station are in “zero gravity” because they are floating around. The post explain:
This is because they are actually moving around Earth’s gravity funnel at the blistering speed of 27,000 km/h (17,000 mph), completing a round-the-world trip every 90 minutes!
Kinetic Energy
Almost all two stage rocket systems have a staging altitude of around 100 km, plus minus 20 km. Therefore, the critical figure of merit for a rocket booster is how fast it can throw a payload of what mass at roughly 100 km. It is important to note that the amount of energy needed to achieve a given velocity increases with the square, so going from 0 km/h to 2000 km/h takes four times as much energy as going from 0 km/h to 1000 km/h, not twice as much.
References:
http://www.spacex.com/news/2015/12/21/background-tonights-launch
http://www.trustedreviews.com/opinions/what-is-spacex
http://www.popularmechanics.com/space/rockets/g768/inside-spacex-we-visit-the-companys-california-headquarters/