# Physics 9-5-13 Avoiding Deer & Throwing Rocks

PHYSICS: Now here is a cliff it’d be fun to throw rocks off of! From Thursday morning help session – a couple of free fall problems.

flickr photo by Al_HikesAZ

# Physics 9-13-11 Chapter 2 Test

Good luck studying for the chapter 2 test. You’re going to do great! Immediately below is the the short conceptual review we did yesterday. Practice the problems, but don’t forget to review/practice the conceptual stuff! Right below that are a couple of the last free fall problems. I’ll be praying for you!! Help session tomorrow morning at 7:15. Any questions?

# Physics 9-9-11 Free Fall Problems Review

PHYISCS – Here’s a question – how could this kid figure out how tall this cliff is? From Friday, here are a few free fall problems that we worked in class. Well, since you are doing such a GREAT job on labs, and since we ran out of time, I’ve posted a review that goes into a little more detail on #32, the “ball dropped from the top of a building and thrown up from the ground at the same time” problem and then a few from me that I thought would help as you work on the homework. DON’T WATCH THIS FIRST!! Try to work the homework problems by yourself first before you look in your notes or watch the vodcast!

Draw a picture, write down what you know and are looking for. What formula fits? On the problems with something going up and then dropping something else, like the pelican or the parachute, don’t forget that the item dropped has the velocity of the first thing. And to find how far apart they are, you usually have to figure in that the first thing was still moving when the second thing was dropped. Make sense? And be careful to keep positive and negative straight! Good luck – you’re doing a great job with these. I’m really proud of you!! Have a great weekend!

flickr photo by JustinLowery.com

# Physics 9-7-11 Free Fall Acceleration

PHYSICS – So how do you like free fall? Here’s the lecture from Thursday on acceleration due to gravity. Hey, what’s your reaction time? Did you figure out why you can’t catch the dollar bill? Also, will this be number 3 or 4 in your lab book?. Put your data in a table and be sure and show all your calculations/work. (Don’t forget that all labs, these and the labs you’ve done that have reports on lab sheets are due on Monday.) Let’s play with the problems tomorrow and see if we can do something useful with free fall!