# Physics 10-1-13 Test on Chapter 3, 2-D Motion

PHYSICS: So you ready for that test tomorrow? Below – first the overview we did in class with a few of the worksheet problems, then below that the help session from this morning.

Don’t forget what you should do to start – Draw a picture, write what you know, resolve the resultant velocity into vertical and horizontal if you need to, and find formulas that fit (because it will hardly ever be solved with just one) and go for it!!

If you are talking angular projectiles, the resultant velocity is actually made up of two things – horizontal velocity and vertical velocity. The horizontal velocity never changes, the vertical velocity has a different direction going up and coming down, but it has the same speed at equal levels. If you’re talking horizontal projectiles, the resultant velocity is the same as the horizontal velocity of the gun – or whatever, because that’s the only kind of initial velocity it has!

Relative motion is even easier – just use the Pythagorean theorem and tangent, and use horizontal to find horizontal and vertical to find vertical. Good bless you! I’ll be praying for you!!

flickr photo by f-l-e-x

__________________________________________________________________

## 17 thoughts on “Physics 10-1-13 Test on Chapter 3, 2-D Motion”

1. Nicolas K P5 says:

The test was very interesting. Hopefully, we won’t have to calculate the negative acceleration of our averages. Looking back I realized what I did wrong on a few of them. Live and Learn.

2. Nicolas K P5 says:

Are the labs due Friday at midnight or in class?

• Ms. Skinner says:

Nicolas – Anything saved to Google Drive is due by midnight of the day that it is due. So Friday, midnight 🙂

3. Will N P5 says:

Is the rocket lab due tomorrow since we just finished it today?

• Ms. Skinner says:

Will – Friday midnight

4. Will N P5 says:

Just looked at the syllabus and found the answer to my question..sadly haha

5. Michael W P5 says:

Were we supposed to take pictures today or can we use the ones you took Ms. Skinner

• Ms. Skinner says:

Michael – You were supposed to take pics, but I might sell you mine! Just kidding – you can have any of the ones I took. 🙂

6. Ryan P P5 says:

We only have two labs to do, correct?

7. Hudson C P5 says:

For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse. Romans 1:20 ESV This verse perfectly coincides with what you were saying in class that The Lord is seen in everything around us!

8. Bekah H P5 says:

Are we still doing the ACT prep next week, or did you change that?

9. Candice W P5 says:

Do we need to have all of our labs as PDF files by tonight?

10. Van K P5 says:

I thought the rocket lab was fun, but I’m disappointed we didn’t actually hit it!! Darn wind resistance!

11. Katherine M HC2 says:

I feel so much better about that test we took Wednesday! I definitely feel more confident about rearranging formulas now that I’ve had more practice.

12. Ryan P P5 says:

I’m interested to see how the challenge goes tomorrow

13. Nicolas K P5 says:

The ACT prep that you’ve given is a good reminder. I’ve forgotten all the techniques. Thanks!

14. Josi L P5 says:

Thank you for showing us ways to work the science section of the ACT. I’m kind of excited to practice it