Orbits

Thursday topic:

-We had a little quiz on Chapter 14: Satellite Motion ( CONCEPT-DEVELOPMENT PAGE) and everybody had the hand-out.

-We also answered the (Gravitational Potential Energy Questions).
Answer:
1. -3.13*10^10 J
2. -2.36*10^9 J
3. +2.98*10^9 Jjavascript:void(0)
4. 2.89*10^9 J
5. -1.18*10^11 J



-Ms. K also gave us New Formula(s):

Escape Velocity
r = Square root 2GM/R


Determining g of a Planet
g = Gm/R^2


Determining R, m, T
T = 2(3.14) Square Root R^3/R^2


Orbital Velocity
v = Square Root Gm/R



-We also had a hand-out about:

( 12.2 The Falling Moon )- It talks about Isaac Newton`s history of how he got things and especially the gravity.

( 14.5 Escaped Speed) - It also talks more on satellite positioning and orbit of earth to sun and etc. Masses, Radius and the Escaped Speed of particular planets in our solar system.

( Mass of a Central Object and Radius of Motion of a Satellite )- It shows the solution in finding the speed of a satellite.
v = 2(3.14)R/T

for m,


m = 4(3.14)^2R^3/GT^2


- lastly Ms. K gave us an assignment REVIEW Chapter 8. (1 - 7).



And that's all folks..the next scribe is Paullin? Camille? or Nailuj89?..

Orbits

Summary:
-Last Tuesday we watch the about Conceptual Physics by Paul Hewitt.
-We also had an assignment ( Gravitational Potential Energy Questions 1 - 5 )
-Assignment also in what we watched and must be 7 key point(s).


Key Points:

- In order the satellite didn't fall on Earth must run 8 km/s
- When it runs less than 8 km/s, in will fall.
- and the time in moves more than 8 km/s, it go in outer space and produce an ellipse orbit.


And that pretty much we discussed last Tuesday.

Blog for April 26th

wow...i forgot to do this last night...

Today in class we:
-handed in the chapter assignment (the one that requires word answers on Katie's post)
-Corrected the Chapter 8 Study Guide
-Corrected the Universal Law of Gravitation Worksheet
-Received 2 new sheets: Defining Gravitational Potential Energy and Gravitational Potential Energy Questions

Here are the answers for the Universal Law of Gravitation worsheet:
1) 7.41*10^-12 N
2) Answers on question 2 vary depending on your weight
3) a - 2 fold
b - 1/4
c - 4 fold
d - 16 fold
4) 1.62*M m/s^2, M = mass of object

I don't have time to post the rest of the answers up for the chapter 8 study guide so i suggest you borrow the answers from someone from class if you haven't already received them. Or you can pray that I'll post the answers and solutions to the questions another time.

Scribe for today is Karen

Universal Gravitation

Wednesday blog:

Sorry i didn't do the blog last Wednesday because I had a fever. By the way, Wednesday blog is about:

1. Continuation of Lab works
2. Answering the Study Guide Chapter 8

and that's all about Wednesday blog. In addition to, the classroom still the same, nothing had change and pretty much noisy just like the way it is ^_^.

Ms. K was still away and Ms. Voon is our substitute teacher.