PHYSICS!!!! YAAARGH!!!! (:

Ok so now that the Fashion Show is finally over (I hope you guys came to watch!), I can finally start and/or finish this scribe post! Ok so it's pretty late and I don't really want to surprise anyone by telling them they are scribe so I might as well just finish the week right? So I'll just gather my information for tomorrows class and scribe for then too. However there is a piece of information that I must share with you.


The next unit test (Momentum and Projectile Motion) is on MONDAY!!!!


Yup, Monday. So study study study!


For now, it's jayp signing out. (:

Ok so now it's time to review what happened this week.

Tuesday, March 16th
Ok so Ms.Kozoriz wasn't here this day (and unfortunately neither was I) but from my understanding, we just got a few sheets to work on. I will go over the answers to the sheets in just a moment.

Wednesday, March 17th
Once again, Ms. Kozoriz was away. Again, I believe we just got some more sheets to work on as well as getting time to work on the previous sheets. Please, correct me if I am wrong.

Thursday, March 18th
Ms. Kozoriz came back. I believe the answers to Projectile Motion 1 and the Chapter 7 Review were gone over. Projectile Motion 2 (back of Projectile Motion 1) and textbook questions were assigned. If you happen to have a textbook with you, the questions were at the end of Chapter 7 (page 152) Problems 6-10. The answers will be gone over later on in the post.

Friday, March 19th
All went back to normal this day. The class was filled and physics continued to roll onwards. The answers to Projectile Motion 2 and the textbook questions. We also listened to another physics song entitled "Harry the Human Cannonball". It was a song about a man who won a woman's heart by applying the concepts of projectile motion. We also got a wordsearch and one of those fill in the blanks sheets for Periodic Motion which we are of course to complete. Also, don't forget we have a TEST on MONDAY on MOMENTUM and PROJECTILE MOTION!

OK so now I will go over the answers for the various sheets we have recieved. Let's start with Projectile Motion 2 (since Projectile Motion 1 is on the site already with explanations and correct answers).

*links to explanations are currently not working. will be up soon*

1)141.2m
solution

2)10.6 m
solution

3)a) 4.42s
solution

3)b)55m
solution

4)70.0m/s
solution

5)a)16.51m/s
solution

5)b)10.02m
solution

Next we move on to the textbook questions:

6)6.5m/s
solution

7)3.17m
solution

8)a)30.6m
solution

8)b)212m
solution

9)30.99m/s
solution

10)a)0.2s
solution

10)b)8.7m (win)
solution

Lastly the review (only the front page because we haven't dealt with circular motion yet).

1)0.25m
solution

2)7.8m
solution

3)a)6.5s
solution

3)b)210m
solution

4)a)0.82s
solution

4)b)N/A
solution

Ok so now just a couple pointers to remember for the test.

Ft=impulse
mv=momentum

impulse=momentum
Ft=mv

momentum = kg*m/s

momentum before collision = momentum after collision (in an isolated, closed system)
in a non-sticky collision (elastic)  m₁v₁+m₂v₂=m'₁v'₁+m'₂v'₂
in a sticky collision m₁v₁+m₂v₂=(m'₁+m'₂)v'

When net force is equal to 0, change in momentum is equal to 0 (in a closed system).

Adding momentum vectors is like adding normal vectors.

Horizontal velocity (for projectile motion) is constant.
Vertical velocity (for projectile motion) changes accroding to g*t (V_v=gt)
V_vf=V_v+gt
d_v=(1/2)gt²
d_h=v_h*t

OK! Well good luck everyone! Study study study! And get lots of sleep and/or rest! (:

Good luck and see you in class my fellow future physicists!

jayp, signing off!

P.S. You get the privilage of being the next scribe...........(drum roll)

Muhanad!

Congrats! You name was pulled out of the hat! Have fun! (: