2018 HS Physics CH

https://youtu.be/Q0ukHtH0s8M

Hi folks, Today we spent time going over some of our previous problems and trying to make sure everyone is on the right track. For homework, I want you to predict how far an object would go (d horizontal )  if it's shot parallel to the ground at the following heights and speeds.  Feel free to review your notes on this before you start.  Use d = 1/2 at^2 to find time.   Then use that time to find distance by using v=d/t.  (Use v=d/t to find horizontal distance travelled since there is NO acceleration horizontally.) 1.  5 m high  5 m/s 2.  10 m high  5 m/s 3.  15 m high 5m/s 4.  10 m high 10 m/s 5.  15 m high 30 m/s Now, once you've done those calculations go to this website.  https://phet.colorado.edu/en/simulation/projectile-motion .  When you get there click on the play triangle and then click "Intro". Now use the website to see if your calculations are correct.  Set the appropriate velocities and heights and se...

In question #3c I should have used 7 seconds instead of 6. So the answer should be: v=d/t v= 76/7 v= 10.9 m/s Sorry about that folks. Jim Mueller

https://youtu.be/HQ5HdDevf78   Class Recording https://youtu.be/g5b1kYxZv0g  Math of the Ball Throw

Hi folks, This week we covered gravity in a bit more detail and spent some time exploring gravity in relation to our acceleration and velocity formulas we've been working on.  To do this, we went outside and everyone got a chance to throw a ball as far and as high as they could.  We then calculated the height, the vertical velocity and the horizontal velocity of the throw. For homework this week: Read pages 168 - 179 in the Conceptual Physics book. Do Review Questions 1 - 14 on page 180. Also, calculate the answers to the following questions using the formulas we used today.  Also, we are in Newtonia so don't worry about air resistance.  :)  1.  Using the first dive on this video  https://youtu.be/ttetLjQ4du8?t=81 a.  If the platform is 30 m high, how long does it take him to hit the water? b.  How fast is he going when he hits the water?  (Use the time you found from the first question) 2. Use the first drop from this video  https...

https://youtu.be/C1RMGGcfTJE

Hi folks, Today we spent a good amount of time tackling those velocity and acceleration problems from even more angles.  We also began to look into the concept of gravity. For homework this week I'd like you to take a look at the following websites and have some fun with the interactives.  For this link, get at least 8 stars.  These take some time to get used to but with some trial and error you should be able to get the hang of them.  I found the Speed v. Time Graphs to be a bit easier than the Distance vs. Time ones. When you are done take a picture or a screen shot to show me that you've done the assignment.    Graphs and Ramps Interactive For this link, do all the "Apprentice Level" and all the "Master Level" problems.  Again, take a screen shot or a picture when you're done.   That Motion Concept Builder Have fun!

Hi folks, Today we spent a good amount of time tackling those velocity and acceleration problems from even more angles. For homework this week I'd like you to take a look at the following websites and have some fun with the interactives.  For this link, get at least 8 stars.  These take some time to get used to but with some trial and error you should be able to get the hang of them.  I found the Speed v. Time Graphs to be a bit easier than the Distance vs. Time ones. When you are done take a picture or a screen shot to show me that you've done the assignment.    Graphs and Ramps Interactive For this link, do all the "Apprentice Level" and all the "Master Level" problems.  Again, take a screen shot or a picture when you're done.   That Motion Concept Builder Have fun!

https://youtu.be/ZWgY_WrhsUo

Hi folks, Got into some of the serious nitty gritty of velocity, distance and acceleration graphs today. For homework this week: On page 26 do all the Plug and Chug questions. I've included the answers in a photo below. On page 27 do all the Think and Explain questions Also do questions 1 - 5 in the enclosed document. Best, Jim Mueller (919) 907-3217

Part 1  https://youtu.be/mpwAHmOdYt8 Part 2 After the Lab   https://youtu.be/qGX8Pve9NPQ

Hi folks, Today we spent some time getting to know the concept of acceleration. It's a key concept in physics and one we will be working with quite a bit and coming back to a lot over the year.  Most of today was spent on a lab working with the acceleration of rubber band powered vehicles. Homework for this week will be to work with the data we collected in class to create some graphs and to use those graphs to answer some questions. First off, using only your group's data, create two different graphs. (Please use graph paper.)  One for velocity vs. time and one for acceleration vs. time.  Time should always be on the horizontal axis.    Once you finish your graphs, answer the following questions. 1.  What was the greatest acceleration that you saw overall? 2.  What was the smallest acceleration? 3.  When you saw a negative acceleration, what did that mean the car was doing? 4.  What was the highest speed any of the cars achieved? 5.  If...