Скачать или смотреть 284 Satellite Orbits_ A JavaScript Simulation Model

Quiz



Instructions: Answer the following questions in 2-3 sentences each.




1. What type of path does an object follow when projected horizontally near the Earth's surface with insufficient speed to achieve orbit?


2. What is the primary force acting on a satellite in a circular orbit?


3. What is the relationship between the velocity and the gravitational force on a satellite in a circular orbit?


4. What is the role of gravitational force in the context of circular motion of a satellite?


5. What happens to the speed of a satellite in a circular orbit?


6. Explain why a satellite maintains a constant distance from Earth in a circular orbit?


7. In the context of satellite motion, what is meant by "centripetal force?"


8. What happens to the orbit of a satellite if its speed decreases?


9. According to the text, what is a common misconception about satellite orbits that students have?


10. What is the key takeaway from the simulation regarding the shapes of real satellite orbits?







Quiz Answer Key




1. An object projected horizontally near Earth’s surface follows a parabolic trajectory when it lacks the speed necessary to orbit. This path curves towards the Earth due to gravity.


2. The primary force acting on a satellite in a circular orbit is the Earth's gravitational force. This force constantly pulls the satellite towards the center of the Earth.


3. The velocity of a satellite in a circular orbit is perpendicular to the gravitational force. This results in a consistent change in direction but a constant speed.


4. In the circular motion of a satellite, the gravitational force acts as the centripetal force. This force is always directed toward the center of the circle, causing the satellite to move in a circular path.


5. The speed of a satellite in a circular orbit remains constant as long as the orbital radius does not change. This constancy exists because the gravitational force does not act to speed up or slow down the object.


6. A satellite maintains a constant distance because its velocity is always perpendicular to the gravitational force. These forces together create a circular path around Earth at a consistent radius.


7. Centripetal force is the force that is required to keep an object moving in a circular path. It is always directed towards the center of the circular path. In the case of satellite motion, this is gravitational force.


8. If a satellite's speed decreases, the gravitational force will become greater than the required centripetal force causing it to be pulled closer to Earth, moving in a smaller, potentially elliptical orbit.


9. A common misconception that students have is that satellite orbits are always perfectly circular. In fact, real satellite orbits are more often elliptical than circular.


10. The simulation demonstrates that real satellite orbits are not always perfectly circular but are often elliptical, which can be observed when the satellite's speed is altered.






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