Tuesday, January 29, 2019
Monday, January 28, 2019
1/28 Physics Class update and homework due 2/5
Hi folks,
Today we took a look at the concept of impulse. Impulse is what causes momentum to change. We also did a lab today where we found out how much impulse a device imparted on a Hot Wheels car.
Also for homework this week is a scavenger hunt. I want you to find two examples of all the concepts written below. So 14 pictures in total.
Rules:
They must all be different.
They must all be photos you have taken with a camera (not images from the internet).
They can be things that you just come across or you can set up situations that exemplify the concept.
Write a sentence for each one indicating why that photo is an example.
Videos are allowed if you wish.
You can print out the photos to hand in or you can email them to me.
1. Newton's First Law
2. Newton's Second Law
3. Newton's Third Law
4. Momentum
5. Impulse
6. Acceleration
7. Inertia
Also, answer the following questions regarding today's lab
1. What procedures did you use to find the impulse of the Hot Wheels car shooter thing? Please describe the steps you took. The measurements you took. And the calculations you did.
2. Since we were looking for impulse of the device, and impulse is Ft, why didn't we measure force or time of the device?
3. What procedure did you follow to calculate/predict the velocity of the car with the extra mass?
4. Since mass increased during the second set of trials, what did you expect velocity to do?
5. Take a look at this experiment in terms of Newton's second law
- What is the force, the mass and the acceleration here?
- How would the change of mass affect the acceleration?
- What do the three settings have to do with Newton's second law?
Tuesday, January 22, 2019
Monday, January 21, 2019
1/21 Physics Class and homework due 1/28
Hi folks,
Today we spent a good amount of time going over conservation of momentum problems. These tend to be one of the tougher problems of the year.
For homework this week I'd like to you tackle the problems in the enclosed .pdf. The answers are included so be sure to check yourself.
Also point your trusty web browser to this page. Underneath the simulation you'll see links for Exercise1, Exercise 2 and Exercise 3. Please do all three exercises. (They are pretty quick.) Occasionally these pages seem to have some issues with certain browsers so if this doesn't work for you try a different browser. I use Chrome and it works well for me.
Re: Bundle up today for class
We've had HVAC people in again last week so hopefully some of those very very cold rooms are warmer. And there are space heaters for any room that needs one.
I did want to let people that since today is MLK Day and a day off for public schools and some companies, there will be more people in the Forge this morning. We will need to keep all 3 rooms with FIRST LEGO League tables free (Carson - blue front corner room, Hopper - middle room, and Dresselhause - far left room with curtain doors). Teams are working toward the state competition and need to test robots on different fields. You're welcome to watch and ask questions. DaVinci (where Physics is held) is still held for Physics. If you need another space to work, please let Gabby or me know.
Linda
On Mon, Jan 21, 2019 at 8:41 AM Jim Mueller <jim@bitesizephysics.com> wrote:
Hi folks,Just a reminder that our classroom may be chilly today. The Forge is a big space and hard to heat (not to mention, expensive as well). You may want to put on an extra layer or two to stay nice and cozy. :)By the way, big big thanks to the folks at the Forge for allowing us to use their space. It's a great location.Best,Jim Mueller(919) 907-3217
Bundle up today for class
Hi folks,
Just a reminder that our classroom may be chilly today. The Forge is a big space and hard to heat (not to mention, expensive as well). You may want to put on an extra layer or two to stay nice and cozy. :)
By the way, big big thanks to the folks at the Forge for allowing us to use their space. It's a great location.
Best,
Jim Mueller
(919) 907-3217
Tuesday, January 15, 2019
1/14 Physics update and homework due 1/21
Hi folks,
Today we spent time with the concept of momentum. We discussed what it is and we also discussed the law of conservation of momentum. Lastly we did a lab where the students measured the momentum of a ball before and after collision.
For next week's quiz, be ready for some momentum problems and those free body problems as well. Be sure you know how to find the mass of an object from the fgrav like we did in class today. Anything from old quizzes is always possible so be sure to take a look at those.
For homework this week:
Read pages 86 - 99
Do questions 1 - 18 on pages 100 and 101
Also, answer these questions relating to today's lab.
1. What did you do to find the momentum of the spheres?
2. When you found the velocity of a sphere, why did you have to multiply it by 2?
3. If both spheres had a mass of 45g and ball 1 had a velocity of 1.8 m/s what SHOULD the velocity of ball 2 be?
4. If ball 1 had a mass of 40g and a velocity of 1.8 m/s and ball 2 had a mass of 20 g, what SHOULD the velocity of ball 2 be?
5. If you increased the slope for ball 1, what would that do to its momentum? Why?
Best,
Jim Mueller
(919) 907-3217
Monday, January 14, 2019
Tuesday, January 8, 2019
Monday, January 7, 2019
Fwd: 1/8 Physics Update and homework due 1/15
Hi folks,
Today we covered Newton's 3rd law which is one of the tougher laws to really fully understand.
For homework this week read pages 74 to 82.
Do Questions 1 - 18
Also, solve the problem below.
.
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