Mu Friction

To stop a moving object, a force must act in the opposite direction to the direction I qof motion.Mike simple this and nice polished floor walking with basketball shoes also spitting on the shoe gives you I did this example because I experience it 

Mass and newtons 1st law

The velocity of a body is changed only when acted upon by an additional force. The produced acceleration or deceleration is proportional to and in the same direction of the force. 

If a baseball player hits a ball with double the force, the rate at which the ball will accelerate (speed up) will be doubled. Football players can slow down, stop, or reverse the direction of other players depending upon how much force they q

A

Inertia investigation

Today i was playing with sheamus with the tennis ball we were kicking it around 

I think kne example of a situation where something move while some stay still was when the one of the table cloth. Where you put the table cloth on top of the table and put the books on top and pull the cloth off the table without moving the books

I think this is an example i was making a paper airplane in mr.Fosters class and threwit at the end of class

Balanced and unbalanced

Balance diagram

So there is me standing up then two girls that have the same strength star fighting over me one is pulling me to the right and the other girl to the left. So normal force and gravity force are the same and applied force are the same because they both have the same strength the applied force is the same size in each side 

Unbalanced diagram 

So i am walking when all of the sudden areally  big branch falls on me. There is  applied forces pushing me down and gravety forcespushing me down as well a  making this sitution really unbalance 

Free body diagram

Theirs gravety force acting up then normal force and friction force.  Thiers  fapp force created by the engine then normal force were is the motorcycle preventing the driver going to the floor the gravety force witch is a force that pulls everything to the middle of the earth 

Vector and scalar

 scalar quantity is a one dimensional measurement of a quantity, like temperature, or weight.  A vector has more than one number associated with it.   A simple example is velocity.  It has a magnitude, called speed, as well as a direction, like North or Southwest or 10 degrees west of North.  You can have more that two numbers associated with a vector.  For example you can add a height dimension to velocity and say, for example, ' I am going uphill at a 5 degree slope in the Northeast direction'.    Vectors are frequently broken down into their components along an orthogonal coordinate system, like the x and y axes.   So you can say the y-component of my speed is 3 km/sec and the x-component of my speed is 4 km/sec.   The magnitude, or speed is the square root of the sum of the individual components, 5 in this case.  The direction with respect to the x-axis would be given by the arctangent of V_y / Vx or 36.9 degrees. 

• Time - Scalar quantities often refer to time; the measurement of years, months, weeks, days, hours, minutes, seconds, and even milliseconds.
• Increase/Decrease in Temperature - The measurement of the medium’s temperature is a scalar quantity; the measurement of the increase or decrease in the medium’s temperature is a vector quantity.

Four forces

Applied force ~ A push or a pull cause by a person or thing. I use applied force in football all the time when i hit and drive were i will hit the person infront of me and push them.

Normal Force ~ A force from a surface usually pushing up. I believe when i am in bed this force is use on me 

Tensions force ~ a pulling force usually in a string rope or chain when i go to the ymca i pull a rope to lift weight

Gravitational force ~ a force that pulls all objects ti the middle of the earth. Well i get pull everything gets pull by gravety

I gave you my notebook

I dont think it was smart of me to guve you my notebook with my notes there

Modeling Acceleration

I think this graph the first image is pretty good because it shows different accelerations . You could tell the difference for example the green line has a greater acceleration than the blue red and purple because a is a steeper line.The  steeper the line the more acceleration it represents because it shows that it troubles a greater distance in a smaller amount of time

Acceleration

The sports car has a greater positive accceleration than the bus so it reaches the speed limit faster than the bus then after a while both of the vehicle are on a constant velocity then up ahead theres a red light the sports car has a faster negative acceleration because it weight less than the bus. The toke longer to stop because it weight more and it takes a greater forces to stop a heavy vehicles.

Guess Method

Given

•State any numbers or info 

•Make sure any numbers and variables are included 

Substitute 

•Put the given in a equation like forme 

•Include units with all the #

Unknow 

•What is the uestion asking 

•What variae you trying to find 

Equation

•State the formula use for the problem

•Rearrage until your unknown is on the left side of the equation by itself 

Solve 

•Complete the math in the equation 

•Include the variable ontill you get your anwer

Speed and Velocity

Instaneous velocity - the velocity at any time 

Average Velocity - the velocity in a given period of time ex: miles per hour 

I think the differents is that one says how fast you travel in this case instantaneous velocity. The other one i think it is for example miles per hour i really dont know how to explain it . It take my friends car 8 sec for hes car to go 60. I am confuse with instantaneous but i will say that my velocity going to school is like a midium rate???? Really dont know what it means .

Distance vs. Time Graphs

Today in class we did a game where we played with with the moving ditector were we had to match the graph in the computer by moving stoping going foward etc...

I think this graphs are neccesary because we need to learn how to graph why does graph look like that and also because it teaches us how to put information in graphs etc..

Distance vs Displacement

Distance-how long you traveled.

Displacement-the length between the starting point and the ending point

Today i did a displacement from my house to my school

I went from my house to joses house and then back to my house i traveled alot like a mile i will say 

Metic Unit

Example metric system & english system

weight146pounds in the English system but in the metric system I weight 66.24kilos 1kilo equal to 2.204pounds.

In my freezer I have a 2litres cocacola. Also the electricity in my house and any house is measure by kilowatts in the metric system. Also my storage capacity in my tablet I believe is 11 megabytes. Why this objects are measure like this I really dont know but if I was to think it may be because is more easier to use or it may be more accurate witch I believe the are both accurate

Estimating Distance

If I was to guess the length of the front of my house I will say that its around 350cm. I think my anwer is pretty reasonable because I remember that 300cm is the distance we work in class with and the of my house aint much bigger than that so I believe my estimate is pretty close.

Distracted Driving

I think that driving while distracted is bad ,because is proven that you react slower when being distracted and that can cause accidents.
   Well last saturday my uncle gave me a ride and he was talking about how I have to be successful in life and he was a little distracted talking to me and me almost crash the guy in front of us.
     Wat distracted him was talking to me but nothing happened. How I feel I really don't care I love adrenaline so it didn't really scare me ir got me mad.