Let’s have a test on Dynamics this week. It will be on Thursday. Tonight (Monday) put in some work on that review assignment given in class today.… read more
Assigned in class today: WS1 # 10, 12, WS2 # 5, 6
What you “feel” as your weight is actually the normal force of the surface below you pushing up on you. This can change!
Now back to grade 11: see this example of how to solve a “system of masses” problem.… read more
Problems assigned in class today: Worksheet 1 # 3, 7, 8, 9
I have given a quick overview of friction in class. If the concept confuses you, or you are interested, the following optional videos are suggested. Otherwise, skip them.
The following is not optional.… read more
No work here – just a whole lotta videos. These cover the introductory review of physics 11 concepts regarding force. We will follow with some practice of physics 11 level problems in class tomorrow.
Your kinematics/vectors unit test is on Monday! Here are the answers to the practice test given on Friday
- 7.3 m/s @ 7.4° above the horizontal
- a) 22 m/s b) 24 m
- a) He’s fine.
First thing, a reminder that the x and y directions are independent of eachother. Motion in the x direction does not cause motion in the y direction – nor vice versa. For proof of this:
Now we consider 2-D projectiles where the start height is different from the end height.… read more
First watch this:
Then watch this, but try to stay one step ahead of him on the problem.
Then watch part 2 of the problem, again staying one step ahead of him on the problem.
One more problem to try.… read more
Add # 5, 7, 9, 12 to “assigned practice”… read more
We went over:
* Adding & subtracting vectors by arranging them tip to tail
* Using cosine law to determine the magnitude of the resultant
* Using the sine law to determine the direction of the resultant
* Relative motion can be determined by subtracting the observer’s vector from the subject’s vector
For practice: Do # 8 & 11 from the practice set.… read more