*Physics 12*

Today you wrote your first UNIT TEST.

Today we discussed the answers for the Friction Worksheet.

I handed out a sheet called *Practicing F=ma Diagrams*. This summarizes all the cases you will encounter with F=ma problems.

We worked through a series of video clips that showed how to apply the F=ma equation to a variety of situations.

Here is a link to the videos:

Block on table over pulley with no friction: Block on Table no f

Block on table over pulley friction:https://youtu.be/LOPhCJ019w8

Pulley with two weights:https://youtu.be/PTYISxR5vAg

Block on incline with and without friction: https://youtu.be/M3JyQ6GdHmY

Blocks and a pulley on an incline without friction: https://youtu.be/F2vkdaGC-V8

Blocks and a pulley on an incline with friction: https://youtu.be/bZgrzCgcOxY

Try questions #15 – 24 in the SNAP book. Here are the solutions:

You also need to try the questions on pages 124-125. Here are the solutions:

Your **DYNAMICS TEST** will be on Friday.

Here are answers to the worksheet More Practice Questions on F = ma