On Fridays short class we worked on acceleration, and as you can see, many other things. We took notes in class, such as these, and Ms.D wrote a lot of formulas and explanations on the board about acceleration. This is all we did the whole class, except for a worksheet we got at the end of the class, which has eight questions on it.
Homework Questions:
- A three toed sloth is moving at the speed of 2m/min. It takes 30min to increase its speed to 15m/min. What is the sloth's rate of acceleration?
- A bicyclist is travelling at a speed of 416m/min when he approaches a hill. It takes him 2 min to travel down the hill. At the bottom of the hill, his speed has increased to 620m/min. What was his acceleration?
- A ball is rolling up a small incline. At the bottom of the hill it is moving at a speed of 5cm/s. Calculate the deceleration of the ball.
- A motorcycle is travelling at a speed of 45km.h. It takes 5s (0.0014 hours) to increase its speed to 65km/h. What is its acceleration?
- A car company claims that the car can go from 0km/h to 60km/h in 7s. What would the acceleration of this car be? ( Seconds should be to the closest 10,000ths when you convert them!)
- A bean bag is dropped out a window. When it falls, it accelerates at a rate of 9.8m/s². If the bean bag hits the ground after 10 seconds, what is its velocity just before it hits the ground? (HINT: What is the initial velocity before the bean bag starts to fall?)
- The same bean bag is dropped out of the same window again. How long does it take for the bean bag to reach the speed of 50m/s? (Everything is the same as above except time!)
- A train travels at a speed of 390km/h can decelerate at the rate of 4500km/h/h (4500 km/h²). How long will it take the train to come to a complete stop?
-dependent upon an object’s reference point
Velocity= speed + given direction
example= 40 kmph heading north
*GPS*, pilots, air traffic controllers
Graphing Motion:
use a line graph-> shows change over time
Time - on x-axis (possibly)
Distance - on y-axis (possibly)
Speed - on y-axis (possibly)
Slope -> steepness of a line
Acceleration:
Speed increase (positive); Speed decrease (negative); Direction changes (positive or negative)
Speed increase= object starting motion from a stopped point; Speed decrease = object is in motion and is coming to a stop
Circular motion:
- Continually changing its direction
- Continually changes its velocity
- Continually changes it acceleration
To calculate acceleration:
Acceleration=
(Final velocity-Starting velocity)÷Time
http://www.wfu.edu/physics/demolabs/demos/avimov/mechanics/loop_de_loop/loop.rm
The next post is...Nathan!
Courtney, this is a good post, I like how you put the notes we took in class and how you put the questions for homework, though I think that instead of putting the questions you could put the link to moodle.The picture was nice and the colors of the font were too. The video you put on was from media player and I could not watch it, next time you could try and find it on YouTube. You used a lot of science in the notes we took in class. Over all I think this is a really good post.
ReplyDeleteHey Courtney! Great post, it was really fun and easy to read! I like the idea of putting the homework questions on the blog post too! I don't think anyone has ever actually done that in my memory! Grest job!
ReplyDeletexoxo, Nina
Hi Courtney, I think that this is an awesome post! I liked that you put the problems that you have for homework and that you included a video! Some things you could have changed were hyperlinking the video and actually say that it is a video, not just put in a link at the end of your post. You also could have said what GPS, pilots, etc. are and how they relate to relative motion. Your spelling and grammar was perfect, and you did your labels correctly. This is an awesome post overall!
ReplyDeleteHey Courtney! I thought it was neat how you put the homework and the homework questions on the blog post. The font and picture were nice, but you maybe could have put the link for moodle. The definitions were good because if I missed a class, I would still know what happened. Overall great post! ;)
ReplyDeleteCourt!!!
ReplyDeleteYour blog posts have improved so much since last year! Your choice and use of colors was very creative and neat and colorful enough, not too much and definitely not too little. It was a great idea how you wrote down all the questions on the worksheet and how you wrote the notes that you wrote during class. Along with the acceleration questions, you could have put the link to it on Moodle too. The video you put on at the end, didn't work for me on Media Player or the Internet, and I think you could have found a video on Youtube! Maybe you could have explained how its possible for seconds to be squared, for example!! In conclusion, great blog post!
Hey Courtney,
ReplyDeleteI like your post, it has all the things we did in class and also has web sites and pictures. I think it was a nice idea to put the homework on there.
Good job
Courtney - Nice work on your first post of the year. Your spelling and grammar look great and I like the font style and colors you have chosen to use. It was nice that you included the homework questions, but I do think they could have just been given as a link to Moodle. Nice inclusion of an image, but it needs a caption near it to explain how it is related to what we covered. Also, your link did not work for me on either computer I was using. In the future you should look at either YouTube or Khan Academy for usable videos, and just put them in as a hyperlink to make things easier for your reader. Your science is good, and I am glad you covered all of the notes we did. However, I think you could have explained the vocabulary we went over with more depth and maybe using some examples we discussed in class. Overall, a good first Scribe Post. ~Ms. D.
ReplyDeleteThank you all for commenting! Now I know what to improve for next time!
ReplyDeleteThanks! :D
Court