Explain why you chose to answer the questions you chose when you presented. Support your choice by explaining and proving your understanding of the concepts involved in your presentation and how they relate to your presentation. This will be graded as Written Proficiency, so be sure to write a well-supported piece with full sentences and paragraph(s) using samples from your presentation and connecting them to the concepts.
For the rocket presentation, me and my group answered the following questions:
1. For a free-falling object, how can you find the distance an
object has fallen?
Ans: To find the height of a free falling object, we need to know the acceleration due to gravity that is acting upon the object. For example, if the object is falling anywhere in earth, the acceleration due to earth's gravity will be approximately 10m/s^2. Next, to find the distance of the falling object, we need to know the time the object stays in the air. Therefore, distance= Acc. due to gravity X time.
2. How does introducing an initial velocity affect an object in
free-fall? Be sure to discuss how d, v, and a are all affected
or not affected as time passes.
Ans: Introducing an initial velocity of a free falling object depends on how the object is falling. If the object is thrown upwards vertically, then the positions of the object will form a parabola. The acceleration of the object will be negative 10 and the instantaneous velocity of the object will gradually decreases until the object reaches its highest point, comes to a stop and falls down again (because the gravity will be acting against the object). After that, the object will fall down, but this time with an increasing velocity. Thus, forming a parabola. If the object is falling down, then the initial velocity will be added to the acceleration, which changes the instantaneous and the average velocity. The initial velocity will be (acc. due to gravity + the initial velocity).
For the rocket presentation, me and my group answered the following questions:
1. For a free-falling object, how can you find the distance an
object has fallen?
Ans: To find the height of a free falling object, we need to know the acceleration due to gravity that is acting upon the object. For example, if the object is falling anywhere in earth, the acceleration due to earth's gravity will be approximately 10m/s^2. Next, to find the distance of the falling object, we need to know the time the object stays in the air. Therefore, distance= Acc. due to gravity X time.
2. How does introducing an initial velocity affect an object in
free-fall? Be sure to discuss how d, v, and a are all affected
or not affected as time passes.
Ans: Introducing an initial velocity of a free falling object depends on how the object is falling. If the object is thrown upwards vertically, then the positions of the object will form a parabola. The acceleration of the object will be negative 10 and the instantaneous velocity of the object will gradually decreases until the object reaches its highest point, comes to a stop and falls down again (because the gravity will be acting against the object). After that, the object will fall down, but this time with an increasing velocity. Thus, forming a parabola. If the object is falling down, then the initial velocity will be added to the acceleration, which changes the instantaneous and the average velocity. The initial velocity will be (acc. due to gravity + the initial velocity).