# 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!

## 5 thoughts on “Physics 9-9-11 Free Fall Problems Review”

1. Cory A P5 says:

When you drop an object off of a high building or cliff does it keep accelerating all the way till it reaches the ground? If a skydiver jumped straight out of a plane would he eventually end up going very very fast? Or is there a certain point at which they finally stop accelerating?

• Ms. Skinner says:

Cory – Great question! Every heard of terminal velocity? Let’s talk about it Monday!

2. Jakin D P5 says:

I know it may be too late to ask for sure now, but could we possibly have a help session Monday? If I need to, I can contact most people in the class through Facebook or Twitter so they will know as well. Thank you for going the extra mile so we can understand these problems!

• Ms. Skinner says:

Jakin – Just got your post. Yes to the help session Monday if you can get in touch with everyone. I’ll try to be there around 7:15ish …. or 7:20ish.

• Jakin D P5 says:

Ok, I’ll do the best I can.