Friday, October 31, 2014
Thursday, October 30, 2014
10/29 Physics class update and homework due 11/7
Hi folks,
Today we began our venture into Newton's Laws. To be honest, everything we've been working with so far has led up to this. Velocity, acceleration, vectors, linear motion has all been leading up to us gaining a strong understanding of Newton's three laws of motion. Today we began with Newton's first law, an object in motion stays in motion and an object at rest stays at rest unless a force acts against them.
Homework for this week is to:
Read pgs. 43-55
Review Questions pg. 56 & 57 #'s 1-20
Today we began our venture into Newton's Laws. To be honest, everything we've been working with so far has led up to this. Velocity, acceleration, vectors, linear motion has all been leading up to us gaining a strong understanding of Newton's three laws of motion. Today we began with Newton's first law, an object in motion stays in motion and an object at rest stays at rest unless a force acts against them.
Homework for this week is to:
Read pgs. 43-55
Review Questions pg. 56 & 57 #'s 1-20
Tuesday, October 28, 2014
Request for physics class
Hi folks,
This week in class I'd like to use a simulation to demonstrate projectile motion. However, I need some assistance. I'd like to have at least 4 or 5 laptops running the simulation so that everyone can experiment with it. I can bring two but I'm wondering if any of you guys would be willing to bring a laptop in with the simulation downloaded onto it. It does need to be downloaded since I do not have internet access in the classroom.
Here is the link:http://phet.colorado.edu/en/simulation/projectile-motion
Please let me know if you can do this and get the sim to run (I know some folks had an issue with this site in the past). If we can get enough laptops we'll do this, otherwise we will do a different lab.
See you all tomorrow!
Science Jim
Thursday, October 23, 2014
Physics update 10/22 and homework due 10/29
Hi folks,
Today we dove a bit deeper into the realm of 2 dimensional motion and I introduced vectors as we worked on understanding projectile motion.
Homework for this week is to:
Read pgs. 28 - 39 in the text book.
Do "Plug and Chug" questions on page 41 #'s 1-5
Do all 6 of the "Think and Solve" questions on page 42 of the Conceptual Physics book.
Calculate the instantaneous velocity of a falling ball for 1, 2, 3, 4, and 5 seconds.
Calculate the distance a falling ball goes in 1,2,3,4, and 5 seconds.
Using the above calculations, create 3 graphs.
Distance vs. time for the falling ball
Velocity vs. time for the falling ball
Acceleration vs. time for the falling ball.
Thursday, October 16, 2014
10/15 Physics update and homework due 10/22
Hi folks,
Today we spent a bit more time on some more of the interesting aspects of gravity that I hadn't had a chance to cover yet. We also took a step forward into projectile motion and two dimensional motion. I introduced the first of several types of problems that we will be working with over the next few weeks.
Homework for next week is to do the following questions.
1. Whoops, you dropped your cell phone. Well…might as well do some physics.
a. If your cell phone dropped of a 10 m (30 ft) tall building how long will it take before it hits the ground?
b. What speed will your cell phone hit the ground at?
c. What average speed will your cell phone have during the fall?
d. What is the acceleration for your cell phone?
e. Create a velocity vs. time graph for your cell phone.
f. Create an acceleration vs. time graph for your cell phone.
2. Grrr, it turns out you didn't just drop the phone, you really wanted to get rid of it to get another one. But, the darn thing didn't break. So, if at first you don't succeed…
a. You climb to the top of a 27 m water tower (don't do this at home) and you're about to drop it again, but you notice that there several people wandering around down below. Curses! However, there's a pond about 60 m away. Can you throw that far? What horizontal speed would you have to throw the phone at to get it into the pond?
b. What vertical speed will the phone be traveling at when it hits the pond?
c. What vertical acceleration does the phone have after you throw it?
d. What horizontal acceleration does the phone have after you throw it?
e. Draw a graph that represents the vertical acceleration.
f. Draw a graph that represents the horizontal acceleration.
g. Draw a graph that represents the vertical speed.
h. Draw a graph that represents the horizontal speed.
Today we spent a bit more time on some more of the interesting aspects of gravity that I hadn't had a chance to cover yet. We also took a step forward into projectile motion and two dimensional motion. I introduced the first of several types of problems that we will be working with over the next few weeks.
Homework for next week is to do the following questions.
1. Whoops, you dropped your cell phone. Well…might as well do some physics.
a. If your cell phone dropped of a 10 m (30 ft) tall building how long will it take before it hits the ground?
b. What speed will your cell phone hit the ground at?
c. What average speed will your cell phone have during the fall?
d. What is the acceleration for your cell phone?
e. Create a velocity vs. time graph for your cell phone.
f. Create an acceleration vs. time graph for your cell phone.
2. Grrr, it turns out you didn't just drop the phone, you really wanted to get rid of it to get another one. But, the darn thing didn't break. So, if at first you don't succeed…
a. You climb to the top of a 27 m water tower (don't do this at home) and you're about to drop it again, but you notice that there several people wandering around down below. Curses! However, there's a pond about 60 m away. Can you throw that far? What horizontal speed would you have to throw the phone at to get it into the pond?
b. What vertical speed will the phone be traveling at when it hits the pond?
c. What vertical acceleration does the phone have after you throw it?
d. What horizontal acceleration does the phone have after you throw it?
e. Draw a graph that represents the vertical acceleration.
f. Draw a graph that represents the horizontal acceleration.
g. Draw a graph that represents the vertical speed.
h. Draw a graph that represents the horizontal speed.
Friday, October 10, 2014
Thursday, October 9, 2014
10/8 Physics update and homework due 10/15
Hi folks,
Today we spent a bunch more time on that tricky acceleration vs. velocity thing. Those graphs can be quite challenging but I think we're getting closer. We also got introduced to two new formulas using the gravitational constant to figure out velocity and distance.
Your homework this week is to:
Using the time of your horizontal throw and the formulas I gave you in class, find out how fast you threw and how high you threw. Remember to 1/2 your time.
Also, do the following .pdf. Let me know if you have questions, this is just the type of thing you may see on an upcoming quiz… :)
Today we spent a bunch more time on that tricky acceleration vs. velocity thing. Those graphs can be quite challenging but I think we're getting closer. We also got introduced to two new formulas using the gravitational constant to figure out velocity and distance.
Your homework this week is to:
Using the time of your horizontal throw and the formulas I gave you in class, find out how fast you threw and how high you threw. Remember to 1/2 your time.
Also, do the following .pdf. Let me know if you have questions, this is just the type of thing you may see on an upcoming quiz… :)
Thursday, October 2, 2014
Wednesday, October 1, 2014
10/2 Physics update and homework due 10/9
Hi folks,
Today we took a look at gravity and many of the very strange aspects of it. We'll spend more time on gravity next week and introduce some formulas into the mix.
Homework for this week is to:
Read Conceptual Physics pgs. 168 - 177
Do the Think and Explain questions on pg. 27 #'s 1-8
Do the Plug and Chug problems on Pgs 26 and 27 #'s 1-6
Today we took a look at gravity and many of the very strange aspects of it. We'll spend more time on gravity next week and introduce some formulas into the mix.
Homework for this week is to:
Read Conceptual Physics pgs. 168 - 177
Do the Think and Explain questions on pg. 27 #'s 1-8
Do the Plug and Chug problems on Pgs 26 and 27 #'s 1-6
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