![]() This would cause the projectile to stay the same height above the earth and to orbit in a circular path (such as path C). But if launched with sufficient speed, the projectile would fall towards the earth at the same rate that the earth curves. Paths A and B illustrate the path of a projectile with insufficient launch speed for orbital motion. The diagram at the right resembles that found in Newton's original writings. And as mentioned in Lesson 3, if the launch speed was too small, it would eventually fall to earth. As the projectile moves horizontally in a direction tangent to the earth, the force of gravity would pull it downward. Consider a projectile launched horizontally from the top of the legendary Newton's Mountain - at a location high above the influence of air drag. ![]() Newton was the first to theorize that a projectile launched with sufficient speed would actually orbit the earth. Once launched into orbit, the only force governing the motion of a satellite is the force of gravity. That is to say, a satellite is an object upon which the only force is gravity. The fundamental principle to be understood concerning satellites is that a satellite is a projectile. Whether a moon, a planet, or some man-made satellite, every satellite's motion is governed by the same physics principles and described by the same mathematical equations. Accompanying the orbit of natural satellites are a host of satellites launched from earth for purposes of communication, scientific research, weather forecasting, intelligence, etc. The moon, the planets and comets are examples of natural satellites. Satellites can be categorized as natural satellites or man-made satellites. Thanks for being patient with the Directions.A satellite is any object that is orbiting the earth, sun or other massive body. That is, after all, the goal of such a Concept Builder as Forces and Free-Body Diagrams in Circular Motion. You will also become a better Physics student for doing that. You will find what you need to know in the two or three paragraphs in this section. You should pay attention to the section titled How to Think About This Situation. Each Help page contains four sections: a discussion of the Fundamentals, a display of the various Questions in the Question Group, a section titled " How to Think About This Situation", and a set of links to resources in our Tutorial section. Of course, the Help pages are only helpful if you read them. Tapping on the Help Me button will open a page with help that is specific to each question. It's how you can turn an exercise in answering questions into an exercise in learning. You should learn to use this feature of the program. You will notice that there is a Help Me button underneath the Progress Report. A question number with a Red background must be correctly answered twice (without a miss) in order to earn a star. However, answering it incorrectly turns the background color to Red. Answering a "Yellow" question correctly earns you a star for that question number. When starting up a difficulty level, the background color is Yellow. You will notice that there is either a Yellow or a Red background for each question number. When you start up any of the difficulty levels, the number of questions for that level are shown in the Progress Report area of the Concept Builder. Once you show success on all the questions for a particular difficulty level, you will earn the reward for level. Stars are earned when you show success on a particular question. Your goal is to earn "Stars" and to complete one or more activities. Your answer will be evaluated and your Progress Report will be updated. Once you have selected your option, stop tapping. The field above the diagram indicates what option you are viewing. Once you'e toggled through all six, you can recycle through the options a second time. Tapping allows you to toggle through the six options for answers. ![]() You can select the free-body diagram by tapping on the diagram section on the right side of the Concept Builder. You will have to think about the situation that is being described and identify the free-body diagram that is consistent with the situation. You will be presented with a verbal description of an object moving in circles. Using the Forces in Circular Motion Concept Builder is quite simple. Concept Builders » Circular and Satellite Motion » Forces in Circles » Directionsįorces and Free-Body Diagrams in Circular Motion - Directions
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |