1/31 qod

How do you know from the ticker tape when the pendulum is at the bottom of the swing?

--ch

Dao 01/30

Today we started the class by check and go over the homework on Friday page 189 # 1 - 8. Then we watched a video on YouTube called "crazy insane water slide". After that we took notes "gravitational potential gravity".
Notes:
- Energy due to gravitational position. U = mgh (sometimes use y instead of h).
- where U is potential energy. m is mass and g is acceleration due to gravity (9.8 m/s^2), h is the height above a reference point (usually the ground). Unit of U is Joules (J)
The teacher gave example of reference point using Jacob's head and a brick.
There is one more equation was : Ei = Ef or Ui + Ki = Uf + Kf. where U is the potential energy and K is the kinetic energy. I'm not really understand this concept, so I can't explain it.
After that we did 2 examples in the example sheet from Friday
and finally was the pair check.
Homework: Finish the pair check,  page 189 #12 - 18 in the text book, Lab manual page 111 - 113 (due Friday)

The problems in "crazy insane water slide" is that the person's speed not enough energy to reach the pool because he slide a long distance on a level surface, which reduce the speed.

1/30 qod

What are some of the problems with the "crazy insane water slide?"

--ch

1/30 qod

What are some of the problems with the "crazy insane water slide?"

--ch

1/27 qod

How would you use the work energy theorem to calculate the work done in stopping a car tht was initially traveling 70 mph?

--ch

1/26 qod

What did you think was the most difficult question on the quarter test?  Why did you think it was difficult?

--ch

1/25 qod

What was your favorite station?  What were the energy transformations at that station?

--ch

1/24 qod

The dial on the far right of an electric meter reads 9.  The dial next to it appears to be just on the 8.  Is its value 7, 8 or 9?  Justify your answer.

--ch

1/23 Nick Bedel

today in physics we went over the blog sheduele, recieved new blue sheets, had our sad team farewells, were placed in our new teams, and had our windmill project. we talked about the rube goldburg machiene and then had our paper tower competition which our class won of course. we then recieved our homework,pondering energy. in order to do work i must not be lazy?

1/23 qod

What has to happen for you to do work?

--ch