More Work with Projectile Motion

Hello, Kristina here with today's scribe. Gee, it has been a long time since I did a physics scribe post O_O..

Anyways, at the beginning of class Ms. K gave out the Projectile Motion sheets from yesterday to those who weren't at class that day. Then she gave us a new worksheet titled, "The Trajectory of a Projectile". We were given 10 minutes to work on it and then we went over the answers.

Here they are:

1) trajectory
2) projectiles
3) horizontal and vertical velocity
4) stays constant
5) increases
6) they don't affect each other
7) gravity
8) no forces act upon the drops; Newton's 1^st Law
9) V_x: stays constant, no force acted on; V_y: gravity acts upon droplet so velocity increases
10) yes, force of gravity would be acting on a larger mass


After we went over the worksheet, we were given another review sheet since our test is apparently on Monday. Only do up to question 4 since those are the projectile motion questions. Make sure you finish them since I believe we might be going over the sheet from yesterday and today's worksheet tomorrow in class.

Ms. K also wanted to note that we should know how to draw an object just being dropped and an object being thrown. Note that the dropped object only has vertical velocity, while a thrown object has a horizontal and vertical velocity. Remember that the horizontal velocity is always constant and doesn't affect the vertical velocity at all!


Ehh...and it looks like I was supposed to scribe for yesterday's class? Although I do remember seeing Darryl choose someone else....so...ah whatever. I'll include yesterday's class too.

So basically, we had a sub yesterday and he made us finish up the Chapter 7 Study Guide since no one had finished it the day before. We then went over the answers after having been given about 30 minutes of class time.

Here are the answers in order:

trajectory, constant, constant, zero, acceleration, force of gravity, equal to, viewpoints, horizontal, horizontal, vertical, trajectory, horizontal, vertical

zero, -9.8 m/s², zero, increases, stays constant

positive, zero, negative, the same, reversed, horizontal, horizontal, vertical, equal, equal


Then after going over the answers the sub went over the sheet titled, "Tossed Ball". Again, I shall post the answers...

Answers:

Horizontal velocity stays constant so the answer for the horizontal ones will be 5 m/s throughout.
Vertical velocities (Starting from the left side): 20, 10, 0, -11.2, -21.2, -30.4

After going over those answers, we were ready to move onto another worksheet, the Projectile Motion one I talked about earlier in this scribe.


Yep, that's all that happened on the past two days. Remember that there is a test on Monday and that catapults are due on Tuesday. The next scribe is Pacifico. Have a happy Pi Approximation Day tomorrow everyone! That is all.