Video mr.same same

Hi! Everyone...it's me Larlyn014 your scribe for today's class...

Today!

We watch a video of mr. same same..I think that's what they call him....anyways...it's about Inertia force.

INERTIA FORCE

• Inertia in other words mass
• Mass in other words Matter

Note: If you have an arrow with a bow then shot it. What's keeping the arrow moving? There's no any things that keeping it moving Inertia that make who make it move by itself.

Sorry that's the only I remember on what we just watch. And I remember there's another example he shows to prove things more clearly.

After watching that Mrs. Kozoris let us finished the worksheet she gave from yesterdays class.That's all for today.

Im really sorry I didn't explain things more clearly. I was trying to find video to clear things up and this is what I found

Here's another one.....example of Newton's First Law

THE INERTIA

Next scribe Intrepid ^_^

hello!!

Hello!! It's me Ramina Lyn..
today in class, we corrected the test, then we started the new lesson "Dynamics". Also we got 4 sheets about dynamic from Ms. k...


here's the correction...

1. Vector quantities
- position
- force
- displacement
- acceleration
- velocity

2. Measure initial and final velocities (add them) and then divide by two or Calculate total displacement divided by time.

3. constant (uniform)

4. a) 650 km
b) 150 km [E]

5. a) 108 km/h

b) 25 km/h [E] ---> 30 km/h [E]

6. a) +10 m
b) 0m
c) -40 m
d) 0m

7. a) +2m/s
b) 0m/s

8. a) Car moving at a constant (uniform) velocity of 0m/s
b) cars slowing down
c) 0m/s
d) -5 m/s2

9. +180 m/s

10. --> start a distance away from motion sensor , stand still
------> walk at a constant speed towards motion sensor and then past it
------> stand still

11. 5.0 m/s2

12. 1120 m

13. 28 m

14. 916. 67 m/h or 920 m/h

We also read the Four Fundamental Forces..

The four fundamental forces are: gravitational, electromagnetic, strong nuclear, and weak nuclear force.

Gravitational Force - an attraction between two objects because of their mass. It is the weakest of the foue force. Range is unlimited and attractive.Also the least selective because it acts between all particles.

Electromagnetic Force - the force that charged particles exert on each other. It binds together the atoms and molecules that make up the matter that we see around us. It can be either attractive or repulsive. It is much stronger than the gravitational force and its range is also unlimited.

Strong Nuclear Force - an attractive force that holds protons and neutrons in the nucleus of an atom. It is the strongest of the four force, but only acts over small distances.

Weak Nuclear Force - million times fainter than strong force and hundred times shorter in range. Much stronger than the gravitational force. It is involved in the radioactive decay of some nuclei. It has been linked with the electromagnetic force.

ok that's all we did today =)

the next scribe is larlyn...

Kinematics Test

Nimen Hao!!!!! (Hi, y'all.)

We had a test today; our test was all about average velocity, acceleration, position-time graph, velocity time graph…etc.oh…it’s out of 40…. i think that's what we all did for today’s class…
We have a new topic ….I’m not sure if it is Dynamic…I found some websites about dynamics …but I’m not sure if they’re related to our new lesson on Monday…..

http://www.euclideanspace.com/physics/dynamics/index.htm
http://regentsprep.org/Regents/physics/phys-topic.cfm?Course=PHYS&TopicCode=01c


JIAYOU!!!!!!!!!(Do ur best)

Hi guys, it's Suzette. Today, we corrected worksheets.

1. Information in Kinematics Graphs
2. Acceleration Motion I
3. Simple Vectors

Answers: Information in Kinematics Graphs



Answers: Accelerated Motion I

1. a. 15 m/s
b. 18.75 m
2. a. 200 m/s
b. 912.5 m
3. a. 1.5 m/s/s
b. 120 m
4. 250 m
5. 11 m/s/s


Answers: Simple Vectors

1. distance - s
mass - s
time - s
area - s
force - v
displacement - v
velocity - v
acceleration - v

2.


3. a. d= 800 m
b. d= 583
angle = 50 degrees

4. a. f = 200 N
b. f = 0 N
c. f = 1414 N


Then after correcting all those sheets, we did an exercise from the book.

Problem - p. 82 -83, # 1, 5, 8, 10, 11, 16

answers:
1. a = 8.0 m/s/s
5. v2 = 33 m/s
8. a. v2 = 607 m/s
b. N = a. 1.83
10. d = 920 m
11. d = 1700 m
16. v2 = 7 m/s

NEXT SCRIBE IS KIMBERLY!

Monday & Tuesday, November 24-25,2008

Today I'll be doing two blogs since I forgot to do it for monday and assign someone for Tuesday. First we corrected alot of sheets in physics, "Components of vectors", first page of Acceleration, 4.1 What is acceleration?

Components of vectors

1. b
2. b
3. c
4. b
5. d
6. a
7. c
8. c
9. b
10. c
11. c
12. c
13. c
14. c

Acceleration (first page)

1. a = V2-V1/Change of time = 25m/s-0m/s / 4s-0s = 6.3 m/s²
2. a = V2-V1/change of time = 29.28m/s-0m/s / 3s-0s = 9.8 m/s²
3. V2 = V1 + a(change of time) = 28m/s + (2.5m/s²)(3s-0s) = 36m/s
4. change of time = V2-V1 / a = 14.1m/s -0m/s / 13.2m/s² = 4.4s
5. change of velocity = a(change of time) = 56.3m/s²(1.9) = 107m/s = 110m/s with sig. digits

What is Acceleration?

The change in velocity divided by the time interval is average acceleration. It can be calculated using the equation a=v/t. In this equation a stands for acceleration, ٨V stands for change in velocity, and ٨t stands forthe time interval. If velocity is measured in metres per second, acceleration is measures in m/s/s, which is read as metres per second per second. The unit also can be written as m/s², which is read as metres per second squared. Like velocity, acceleration is a(n) vector quantity, which means it has both magnitude and direction. When velocity increases, acceleration is positive. When velocity decreases, acceleratin is negative.

Average and Instantaneous Acceleration

A velocity-time graph shows how velocity depends on time. The rise of the curve represents the change in velocity. The run of the curve represents the time interval. The slope of the curve represents the average acceleration. If the curve on a velocity-time graph is a straight line, the acceleration is constant. If the curve is not a straight line, acceleration is changing. The slope of a line tangeant to the curve is the instantaneous acceleration at that time.

Velocity of an object with constant acceleration

Acceleration that does not change in time is constant, or uniform, acceleration. The velocity when the clock time is zero is the initial velocity. The velocity after acceleration has occurred is called the final velocity, and is calculated using the equation V2=V1+at. In this equation, V2 is final velocity, V1 initial velocity, a is acceleration, and t is time interval.

Displacement when velocity and time are known

If an object is accelrating, its displacement can be calculated using the equation d=(V2+V1/2)t. In this equation, d stands for displacement, V2 stands for final velocity, V1 stands for initial velocity, and ٨t stands for time interval. To find displacement using a velocity-time graph, find the area under the curve.


Well this is all i can remember correcting over these two days, tell me if i forgot something and i'll try to find the answers to those also. Also don't forget to do the 2nd page on "Acceleration" as we will probably correct it in class tomorrow.

TOMORROW'S SCRIBE : Suzette

Friday's class

Friday, november 21/2008
In class we had a subtitute. I dont quite remember what her name was, but anyways..In class we were given a few things to do.
1.) Read 6.1 & 6.2 (p.110- 119)
Graphical and Analytical Vector addition
2.)End of chap Q's: p.129 #1-7 (6.1 Q's)
-> (fig 6-25 p.128)
-> 4 for #2, 5 & 6
im pretty sure thats all we did, no homework because we couldn't take the book home, so yeah if i missed anything else , tell me and ill fix it.

By the way this is erica maquimot scribing for last friday instead of aldrin.
And the next scribe is : anthony lee .

HEEY GUYS!!

today in physics class ms.kozoriz "section 5.1: graphing motion in one dimension" and "section 4.1: properties of vectors". Here are the answers
Section 5.1: Graphing Motion in One Dimension

1. Position(y-axis) Time(x-axis)
2. At the same position
3. Objects at rest
4. Not a finite period of time
5. 0's
6. A
   
7. D
8. B
9. B
10. D
11. C
12. arrows going to the right that are the same distance apart
13. two dots separated from each other
    
14. arrows going to the left that are the same distance apart
    
15. False (4 quantities)
16. True
17. False (d represents the the position at any time)
18. True
19. True

Table One
Segment v a - 0.25km/min
v b - 0
v c - 0.4km/min

Δt a - 10min
Δt b - 7min
Δt c - 13min

Δd a - 2.5km
Δd b - o
Δd c - 5.2km

Table Two
Δt = 30min
distance ran = 7.7 km
displacement = 17.7
average velocity = 0.26 km/min


Section 4.1: Properties of Vectors

1. 6km (E)
2. 6km (N)
3. 6km (NW)
4. 4km (N)
5. 3km (W)
6. 5km (SE)
7. 4m (SW)
8. 12km (E)
9. 20m (SE)
10. 400m (W)
11. b) d=2.0 km north
12. d) d=2.0 km
13. H,F,B
14. B,F,G,I
15. B,F
16. True
17. False (protractor)
18. False (tail)
19. True
20. False

Ms. Kozoriz also taught us something about adding vectors. Here it is if you guys missed it















And for the people that was away, dont forget to hand in the "appendix 3.8: inter pretending position time graph which was due today. and we also received 3 sheets called "section 4.2: components of vectors, Simple Vectors, and a crossword puzzle. so dont forget to pick those up.

THE NEXT SCRIBE : ALDRIN SAYUNO