Astronautics
education·@jonathanxvi·
0.000 HBDAstronautics
<html> <p><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Hubble_Space_Telescope_over_Earth_%28during_the_STS-109_mission%29.jpg/1024px-Hubble_Space_Telescope_over_Earth_%28during_the_STS-109_mission%29.jpg" width="1024" height="674"/></p> <p><a href="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Hubble_Space_Telescope_over_Earth_%28during_the_STS-109_mission%29.jpg/1024px-Hubble_Space_Telescope_over_Earth_%28during_the_STS-109_mission%29.jpg"><em>Image source[1]</em></a><em>: </em><a href="https://en.wikipedia.org/wiki/Hubble_Space_Telescope"><em>Hubble Space Telescope</em></a><em> over Earth (during the </em><a href="https://en.wikipedia.org/wiki/STS-109"><em>STS-109</em></a><em> mission).</em></p> <p> Hello friends, today we are going to talk a little about astronautics. </p> <p> <a href="https://en.wikipedia.org/wiki/Gravitational_potential "> <strong>Gravitational potential energy</strong></a>: </p> <p> When an object is at a height h above the ground it has a gravitational potential energy. This means that, due to the force of gravity of an object that attracts it, it has accumulated some energy. This energy can be released simply by letting it fall freely. Thus, when you reach the ground you will have a kinetic or movement energy equal to the potential energy that you accumulated when you are at a height h. If the object is placed at a height h the energy it accumulates is: </p> <p><img src="https://s18.postimg.org/kwq27ts7t/figure34.png" width="228" height="83"/></p> <p> <a href=" https://en.wikipedia.org/wiki/Free_fall"><strong> freefall</strong></a>: </p> <p> It was <a href="https://en.wikipedia.org/wiki/Galileo_Galilei">Galileo Galilei</a> (1564-1642) who first deduced that in the absence of friction, that is, by eliminating air resistance, all bodies fall to Earth with the same acceleration regardless of their mass. </p> <p> Projectiles launched from the surface of the earth. The objects that are on the surface of the Earth remain on it due to the force of gravity of it. An object will remain that way as long as there is no force opposing the force of gravity. </p> <p> If an object is thrown upwards, basically one of the following three Situations can occur: </p> <ol> <li> It reaches a height h and returns to the surface of the Earth. </li> <li> It stays in orbit around the Earth. </li> <li>It is released from the gravitational attraction of the Earth and moving away indefinitely from it. </li> </ol> <p><img src="http://img.fenixzone.net/i/TnxUArg.png" width="679" height="473"/></p> <p><img src="http://img.fenixzone.net/i/pyVkHEG.png" width="613" height="406"/></p> <p><img src="http://img.fenixzone.net/i/WzgYqPF.png" width="606" height="406"/></p> <p> <a href="https://en.wikipedia.org/wiki/Projectile_motion ">Parabolic shot</a>: </p> <p>If a projectile (object) is thrown upward in a direction other than the vertical in the presence of a gravitational field then the movement of the projectile can be described as the sum of two movements, one horizontal and one vertical. The horizontal movement has constant speed while the vertical movement is an accelerated movement. </p> <p><img src="https://s22.postimg.org/miro2gbwx/vote11.png" width="1280" height="758"/></p> </html>
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