Solving Projectile Motion Problems

Today we went through a process for solving projectile motion story problems.

Notes: Projectile Motion Problems

Here is the work for the airplane problem:

Here is the work for another problem in which someone jumps with a speed of 11 m/s at an angle of 20 degrees above the horizontal. We found the time it took to reach max height, the jumper's max height, and the horizontal distance the jumper went before coming back to his/her original height.


Homework is —Ch.3 (p. 80) #25, 27, 29, 30, 48, EXTRA CREDIT: #47. We'll be doing this lab on Tuesday (no school Monday).

Motion in 2 Dimensions

Motion in 2 Dimensions (Projectile Motion)

I could not get my videos to embed in my Powerpoint - sorry! - so here are links to the ones we saw:

Three Balls Roll Off a Table
Mythbusters Bullet Drop
MIT Monkey Problem

Homework: Projectile Motion TIPER #1 (email miss.volkening@gmail.com for a copy)

Relative Velocity

Bellwork is was a small half-sheet called ESA Practice: Vector Components. We used it to review yesterday's material and to look at the Evaluating Student Answers category of question, which will show up repeatedly in the future. You did not turn in this little paper.

Later we talked about relative velocity. There aren't a lot of notes; here is what ended up on the board first period:



Mythbusters did a pretty cool experiment showing the forward velocity of a truck cancelling out the backward velocity of a cannonball so that the velocity of the cannonball relative to the ground was zero: Mythbusters Frame of Reference.

Section 3.5 in the textbook also talks about this, albeit with a lot more math than we used.

Homework is in two parts tonight:

A.) Kinematics TIPERs #4 (email miss.volkening@gmail.com for a copy)
B.) p.82 #41 & 44

Please note that this means you will be turning in two different things tomorrow.

Vectors

Today we talked about adding vectors in general. There is very little physics today - just math that we'll need from now on.

Notes: Vectors


Homework: p.78 #1, 17, 18


Also, your test scores are now in the computer, though they are not yet actually affecting your grade. I will make them “count” on Friday. You can retake a test if you got less than 80% - just come in after school/lunch/conference.

You will have a graphs-only MC quiz (20 min) sometime before next Wednesday.

1-D Kinematics Test

Today is your test! Your Free Fall Lab is due the next time I see you.

Practice Test Time

Today you had time to continue working on your practice test. Below are pictures of the abridged key.



Test tomorrow, lab due first thing next week.

Practice Test

Today was your last day to work on your practice test. I also took a few minutes to go over how to maximize points earned on my tests:



I will post a key to the practice test tomorrow.

We also talked about what to do if Synergy says you're missing something that you are sure you turned in. Do these things in this order:

1. Check the no-name papers (top tray in the returned work trays)
2. Retrieve your returned work. Sometimes I put the score in the wrong column or row. If this has happened, just find the graded and returned paper and show it to me so I can fix it.
3. You turned in the paper, but later than the due date. These will take me longer to get to. In the meantime, Synergy will show the assignment as "missing." The only thing to do is wait a bit longer.
4. Check your stuff. Maybe you completed the assignment but didn't actually turn it in.