# Motion

### Melia, Taylor, and Erica

## Explination

**http://www.youtube.com/watch?v=xKmhS4qLj_s http://www.youtube.com/watch?v=9G1dhkRJ3ak**

*(A)**Motion:The action or process of moving or of changing place or position or change in distance over change in time.*

*Acceleration: Change in velocity over time.*

*Motion is relative, constant motion, no change detected.*

*We are going to explain different concepts of motion, the teks and more. Rotational, Translation Oscillatory and Deformation*

*The last one is not traditionally thought of but while a spring moves on a linear path it is caused by deformation of the metal.*

*Rotational = planets orbits*

*Translation = projectile path or linear*

*Oscillatory (Vibratory) = periodic like a pendulum, vibrations as in the vibrations of a string or the oscillating movement of a photon which moves in a linear fashion while vibrating*

*Deformation = motion inside of an object like tension, buckling, twisting, compression, or expansion. - Translation: Motion along a path*

*examples: Position, Velocity, Net force*

*- Rotational: Rigid of a body about an axis*

*- Rotational: Orientation of the axis, Angular position,*

*- Deformation: Bending, stretching, twisting,*

*examples: Internal elastic forces, springs, tension and compression*

*Real time technology is a set of systems and applications that respond in a timely fashion to requests for information and are composed of two essential components: timeliness and capacity.*http://www.youtube.com/watch?v=2OJjbztWitk

As you see on the graph, X axis shows us time and Y axis shows position. We observe that position is linearly increasing in positive direction with the time. We understand from this linear increasing, our velocity is constant. If it was not constant we would see a curved line in our graph. Now, we use this graph and make some calculations. | this picture goes with tek (D) |

As you see on the graph, X axis shows us time and Y axis shows position. We observe that position is linearly increasing in positive direction with the time. We understand from this linear increasing, our velocity is constant. If it was not constant we would see a curved line in our graph. Now, we use this graph and make some calculations.

## Motion

**(B) Motion 1D**problems can be broken down or separated into one or more 1 Denominational problems. You set up a coordinate systems with positive and negative directions (obviously).__Scalar__- has only a magnitude, area or temperature.

__Vector__- has magnitude and direction like displacement or velocity.

**Analyzing** the motion of objects, 4 basic parameters; time, displacement, velocity, and acceleration. Time is scalar while the other three are vectors.

*It's rather hard to identify the difference between scalar and vectors in 1D.*

**Displacement**- represents distance traveled, final position (x), starting position (y).

*Say you start in one position and move North 5 meters from where you started, your displacement is 5 meters North. If you turn around and go back with a displacement of 5 meters South. You would have traveled a total of 10 meters. Your net displacement is 0 because you're back where you started. *

**(C) Accelerated motion: **motion with a continually increasing velocity. motion in more than one dimension that undergoes constant acceleration is given by the vector equation:

**x**(t) = **a** t 2 + **v** 0 t + **x** 0

*http://www.ehow.com/video_5112651_projectile-motion_.html?ref=Track2&utm_source=ask *

**(D)** When the forces balance, the net force is 0, and the object does not accelerate. When one force is larger than another on the same object, you get a net force, meaning the object will accelerate. This is basically explained by Newton's 1st Law - an object at rest remains at rest and an object in motion remains in motion unless acted on by an outside force. You can be moving, but have balanced forces acting on you giving you a net force of 0. The best example is driving down the highway in your car with the cruise control on. The force of the engine propelling you forward is balanced by friction and air resistance pushing you backwards. The result is a net force of 0 and your car not accelerating, but staying at a constant speed. Force and acceleration are typically similar

* force =mass x acceleration*

*therefore mass = force /acceleration*

and acceleration = force/mass

and acceleration = force/mass

**(E) **A **free-body force diagram** is used to show all the forces acting upon an object to predict the net force and ultimately the path of the object.

**(F) **Frame of reference is related to motion because reference points enable us to see that an object is moving. Motion is related to a frame of reference because there is no such thing as 'real' motion

*or 'real' rest. Rest and motion are always with reference to something else.*

## Sources.

http://hyperphysics.phy-astr.gsu.edu/hbase/relmot.html

http://library.thinkquest.org/10796/ch4/ch4.htm

http://www.physicsclassroom.com/class/1dkin/u1l1d.cfm

http://camillasenior.homestead.com/motion_graphs.pdf

http://support.google.com/docs/bin/answer.py?hl=en&answer=91610

http://www.gapminder.org/upload-data/motion-chart/