Physics 12

Physics 12

Friction & Inclines

Friction & Inclines

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.

https://www.flippingphysics.com/friction-intro.html

https://www.flippingphysics.com/mu-intro.html

https://www.flippingphysics.com/friction-equation.html

https://www.flippingphysics.com/friction-problem.html

The following is not optional.… read more

Monday: Dynamics Intro Videos

Monday: Dynamics Intro Videos

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.

https://www.flippingphysics.com/force.html

https://www.flippingphysics.com/force-of-gravity.html

https://www.flippingphysics.com/weight-not-mass.html

https://www.flippingphysics.com/free-body-diagrams.html

https://www.flippingphysics.com/first-law.html

https://www.flippingphysics.com/second-law.htmlread more

Practice Test Answers

Practice Test Answers

Your kinematics/vectors unit test is on Monday! Here are the answers to the practice test given on Friday

Multiple Choice

  1. A
  2. C
  3. C
  4. D
  5. B
  6. D
  7. D
  8. B
  9. A
  10. B

Written

  1. 7.3 m/s @ 7.4° above the horizontal
  2. a) 22 m/s b) 24 m
  3. a) He’s fine.
read more
Lecture: 2-Dimensional Projectiles

Lecture: 2-Dimensional Projectiles

First watch this:

https://www.flippingphysics.com/projectile-motion.html

Then watch this, but try to stay one step ahead of him on the problem.

https://www.flippingphysics.com/projectile-motion-problem-part-1-of-2.html

Then watch part 2 of the problem, again staying one step ahead of him on the problem.

https://www.flippingphysics.com/projectile-motion-problem-part-2-of-2.html

One more problem to try.… read more

Vectors: Tip to Tail

Vectors: Tip to Tail

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