Mu - Friction

Melissa Gutierrez
Period 2
12/8/14

Friction happens because there is interference between the contact of the object and a constant speed. Friction varies on the object, so Soccer cleats would have a hard friction with snow. Just like Timberlands would be hard to play soccer with.

Another Planet

Melissa Gutierrez
Period 2
12/3/14



This planet of mine is a special planet because everything is huge. If you think an ant is small, think again an ant now here , is the size of a car! Its gigantic. Although it does seem a lot like the planet earth. This planet has gravity pulling us down in order to stay on the ground, although some parts of "my vibes planet" has spots in which gravity doesn't exist! a free for all of course and there is no centripetal force you let gravity take you away!

Mass and Newtons first law

Melissa Gutierrez
Period 2
 11/20/14

1) I usually ride bikes when its not so cold out, and i notice myself riding down a hill, usually i notice that if I'm on a very steep hill going down, i can let go of the bars and i would be going down still at a constant speed. Inertia shows how "things like to stay where they are" as if i didn't have friction, id be going on forever!

2)  Cars. Some cars i see, everyday really do tie into inertia. If a car is going 90 on the freeway, inertia makes it go , on and on until friction stops it and gravity keeps it down.

3) Roller Coaster! when i see a roller coster we obviously have that scary moment in which we're going slowly up the ride, but then we also have that moment in which the coaster goes downward into a plunging ride. Inertia would send you flying, forever but the seatbelt keeps you down.

Inertia Investigation

Melissa Gutierrez
Period 2
11/17

1. An example of "Inertia" that I saw today, was a tree, no matter this rain, snow, summer or fall in Boston a simple tree goes through inertia, where everything around it changes, moves and does everything but it stays still. 
2. Another example of "Inertia" that always stays still would be a building, it has the same rules as a tree, much happens around it. 
3. A final example of Inertia would be shaking a bottle of ketchup. When bringing the bottom down, the suddenly stopping it, inertia is what causes the ketchup to come out of the bottle.

Balanced & Unbalanced

Melissa Gutierrez 

Period 2 

11/13/14 

This is an example of a balanced force. A balanced force would be when all the forces are equal to equal. 

This is an example of unbalanced force, the net force isn't equal. The unbalanced force is when the net force isn't equal. 

Free Body Diagrams

Melissa Gutierrez
Period 2 
11/12/14 

this is a 10 KG boulder, in this diagram it shows as always, gravity , because gravity always pulls the object to the ground, then theres normal force holding the boulder. then , theres applied force moving this to the right, as the boulder moves this create friction. 

Vectors & Scalar

A scalar quantity is a quantity that is fully described by a magnitude/size without anything else! However a vector quantity, has magnitude as well as a direction... 
An example of what we didn't cover in class would be this youtube video! https://www.youtube.com/watch?v=FvcHKhdaAyw this video expresses projections through scalar and vectors ? id  like to learn more about that.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Four Forces

There were 4 forms of forces we talked about today in class, the first one was 

1. Applied Force (Fapp) is when you make contact with an object to make it move. So for example, today I had a ball. The ball needed force to move it which i applied myself! That would be the definition of Applied Force. 
2. Gravitational Force (Fg) is when gravity takes control over the object. So for example, today i used gravitational force by jumping, and the gravitational force pulled me to the ground! That would be the definition of Gravitational Force.
3. Normal Force (FN) is when an object requires no force. For example, today I came home to find my laptop sitting on my desk. That required Normal Force. 
4. Tension Force (FT) is when the force has a type of pull to it that requires back spring. For example, today i used a scrunci today to basically explain a bun and i pulled the scrunchi to my wrist a couple times. The tension force pulled the band back on my wrist. 

GUESS method

G - represents the given , the information that problem gives you.
U- " the unknown" the variable that the problem didn't give that we have to find out!
E- the equation , the puzzle! this is what you need in order to solve your problem
S-substititute ! this is what you will need , the formula is missing these numbers, information used in order to solve it, now practice it.
S-solve ! this is the final step, all these ways have been put to use in the previous way, but this is all we need and you're done!

Modeling Acceleration

 http://www.grc.nasa.gov/WWW/k-12/VirtualAero/BottleRocket/airplane/rktalo.html


This picture shows demonstration of acceleration, and the model in this case is the rocket ship. The Rocket ship demonstrates the configuration that the rocket uses to liftoff. 

Acceleration

notes :
sports car 
school bus 
*both stopped by a stop sign * 
* explain the differences & similarities of the motion of both vehicles as they go from a stop sign to the speed limit of 30 mph * (for every vehicle) 
* explain the differences & similarities as they stop at the next red light* (for every vehicle) 


Both model vehicles have the same velocity towards the stop sign. As approaching the stop sign, negative acceleration occurs. Both vehicles have a different displacement. The model vehicles have a precise positive acceleration of 30 mph as the vehicles maintain a constant velocity. 

Speed and Velocity

Melissa Gutierrez 

Ms. Reid 153

Second period

10/8/14

Speed and Velocity 

Speed is an object going at a rate or motion of progress, and how something can go at a certain pace. Velocity , is the the rate of speed, in which something happens. Displacement is the vector between location 1 and location 2. 

Average velocity is when an object goes from 1 through 2, that takes time. Instantaneous Velocity is velocity the time reaches to zero. 

Distance vs Time Graph

Melissa Gutierrez
Ms.Reid
Honors Period 2
10/7/14

Distance vs Time Graph

In class today, we used motion detectors and a graphing site to match how motion would react to time and distance. As we stood a few feet away from the board, the graph would react to an upwards line. A lot of the lines used were based on how further or toward we went. These graphs would be important to our Physics class in which we use these subjects. Motion is caused by time and distance.

Distracted Driving

Melissa Gutierrez 
Ms.Reid 
Second Period 
9/22/14

Distracted Driving: 

By all means, Distracted Driving is by far the worst. Distracted Driving has horrible intentions in which usually result in an accident or a death. A time that I have been in a car at the time with a distracted driver was with my older sister. My sister was driving, and she had her lovely cell phone in her hand... meanwhile I'm always looking straight looking out for her, she comes to a curve and a lady, is seen to be walking across the street, at the same time my sister is texting. I noticed the lady, thinking shed get across the street at the time my sister would pass but no! I screamed and she quickly hit the brakes as the old lady stopped. I will never get in a car with her unless her phone is in my hands!

Distance vs Displacement

Melissa Gutierrez
Ms.Reid
Second Period
9/30/14

Distance vs. Displacement

Distance is the amount of space in between two points or things.
an example of how I used "distance" today is in drill practice, using "forward march", is a form of distance I used until I did the command "rear march" which brought me towards the starting point.

Displacement,  is the direction in which the object or person went, that landed it in its location.
an example of how i used displacement today was getting to the other  class, i start from my
(ending) class and go certain directions to end to my (starting) class.

Metric Units

Melissa Gutierrez 
Ms.Reid 
Second Period 
9/24/14 

Metric Units 

Three things at home that feature metric unit systems :

• My fathers guitar, is one meter long. 
• The soda, at home is one liter. 
• My door is about 4 and a half meters long. 

Estimating Distances

Melissa Gutierrez 
Second Period 
Ms.Reid
9/23/14 

Estimating Distances 

I estimate the front of my house to be about 4 meters long, at the front. I find this to be a little unreasonable for the given fact that its bigger, once you enter it its not as small as four meters but that would have to do with dimensions... so i find it unreasonable. 

Reaction Time Homework

Melissa Gutierrez
Ms.Reid 
Second Block 
9/18/14 
Reaction Time Homework 

Reaction Time, is a certain form in which someone or something draws attention to an object at a certain timing. It usually uses the methods of time and speed. One of three encounters I've had with "Reaction Time" is everyday for me. I always wake up to an alarm, everyday to go to Drill Practice for JROTC, I'm there at 6:30 sharp. I react to the alarm, and how I have to be ready and up at a certain timing. The second time I've encountered a form of "Reaction Time" is how I react to driving... I've done test drives with my sister to be ready for when I get my permit. Although, yes we drive in parking lots and big, empty spaces I'm attentive to when and where to slowly hit the brakes/gas. I mostly react when I stop. The last form of three in how I use "Reaction Time" is the most common! I, as a teen use my phone quite a bit. I do not feel safe without it, I am very cranky without my phone and every time I receive a text/i message I react. I always respond and very quickly when it's an emergency! I'm ALWAYS alert of my phone and when I get a text and which one to respond to/ not respond to... but thus, these have been my three forms of how I use "Reaction Time" on a daily basis.