Thursday, September 3, 2009

Chapter 2&3 Blog

Post 10 things you find of interest from each chapter in this blog.

25 comments:

  1. Chapter 2:
    1) Over 2000 years ago, Greek scientists were familiar with some basic concepts of physics.
    2) Aristotle broke down motion into two different categories, natural motion and violent motion.
    3) Aristotle believed natural motion could either go straight up or straight down.
    4) Aristotle believed that celestial bodies were made of perfect spheres and were made up of quintessence.
    5) Aristotle learned at the Academy of Plato and tutored Alexander the Great.
    6) Copernicus formulated a theory that the Earth revolved around the Sun.
    7) Galileo disproved many Aristotelian ideas.
    8) Newton's first law states that an object at rest or in uniform motion unless it is compelled to change by forces impressed upon it.
    9) A force is defined as a push or a pull.
    10) When the net force of something is zero, it is defined as being in mechanical equilibrium.

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  2. Chapter 2
    1) Natural and violent motion are the two main classes.
    2) Natural motion can be straight up or straight down.
    3) Violent motion is a pushing or pulling force.
    4)copernicus thought the earth traveled around the sun.
    5)the less friction the more constant speed is.
    6)on a steep slope the speed is lost faster then on a lesser slope.
    7)law of interia: when the object is doing what it does unless force is placed on it.
    8)Tension force is upward while weight is downward.
    9)Support force is upward.
    10)friction force must be equal and opposite to pushing force.

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  3. Chapter 3:
    1) Motion is relative.
    2) Galileo was the first to measure speed by using distance and time.
    3) You must know the speed and direction of an object to know its velocity.
    4) Acceleration applies to the decrease as well as the increase in an objects velocity.
    5) Galileo used inclined planes to develop the concept of acceleration.
    6) During each second of a free fall, and object gains a speed of 10 m/s.
    7) The hang time of a great jumper is usually less than 1 second.
    8) Acceleration is complex because it is a rate of a rate.
    9) Change is the key idea for acceleration.
    10) Both a change in speed or direction can change the velocity of an object.

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  4. Chapter 3
    1. speed is the distance covered in a unit of time.
    2. motion is relative
    3. the speed at any instant is instanteous speed.
    4. the average speed is known as distance.
    5. Constant velocity means when you keep the same speed.
    6. when you change the speed or direction the velocity is changed.
    7. Acceleration is when the speed is changed with time.
    8. no friction and it just falls is free fall.
    9. How far the object lands is way different then how fast is falls.
    10. Rate is the change of position.

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  5. Chapter 2
    *Aristotle on Motion
    -Natural motion can be straight up, down, or like Earth, circular.
    -Violent motion is a motion due to pushing or pulling forces.
    -All motion results from the natural movement of objects due to push or pull expected that it is in its proper place.
    -An object will not move without force, excluding celestial objects.
    *Copernicus and the Moving Earth
    -Copernicus believed the Earth moved but didn't let that theory out until before he died, for fear of the church.
    *Galileo and the Leaning Tower
    -Galileo showed that objects of various weights fall at the same time.
    *Galileo's Inclined Planes
    -Galileo found that a ball going downhill picks up speed, a ball going uphill looses speed, and a ball going horizontally will stay constant as long as there is no friction to stop it.
    -Inertia is when a ball can move forever without speed change or any secondary force upon it.
    *Newton's First Law of Motion
    -Newton's first law, law of inertia, states that every object stays still or continues in a straight line unless it is changed by any force upon it.
    *Net Force
    -A Force can be gravitational, electrical, magnetic, or muscular and a Net Force is when there is more than one force upon an object.
    -A Vector Quantity is when a force has magnitude and direction.
    *The Equilibrium Rule
    -Mechanical Equilibrium is when the net force on something is zero.
    In measurement 2 lbs equals 9 N (Newtons)

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  6. Chapter 2&3:
    1)Aristotle divided motion into two different classes:Natural motion&violent motion
    2)Natural motion can be either straight up or straight down
    3)Violent motion resulted from either pushing or pulling
    4)Circular motion has no beginning or end
    5)Slope downward,speed increase/slope upward,speed decreases
    6)Everything moves-even things that appear to be at rest
    7)motion is relative
    8)When a driver presses the gas pedal the passengers experience acceleration
    9)The term acceleration applies to decrease as well as to increase in velocity
    10)Aristotle's statements about motion were a beginning in scientific thought

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  7. Chapter 2:
    1) Their is two main classes: natural motion and violent motion.
    2) The 4 types of nature is earth, water, air, and fire.
    3) Objects that fall at a speed are about the same as the weight.
    4) If it is heavy it will fall faster.
    5) Pushing or lifting a heavy weight is a imposed motion.
    6) Aristotle said that all motions are due to the nature of the moving object.
    7) Everything will continue in motion unless there is change in thee state by fores impressed upon it.
    8) A change in motion are produced by a force or combination or forces.
    9) A weighing stretching spring is under a stretching force called tension.
    10) The symbols E stand for the vector some and f is for forces.

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  8. Chapter 3
    *Motion is Relative
    -Everything is in motion even if it seems to be still.
    -There are many different units for speed.
    -Instantaneous Speed is the speed at an exact instant.
    -Average Speed = total distance covered/time interval
    -Velocity is speed and direction.
    -Vector Quantity is velocity that specifies direction and magnitude.
    *Acceleration
    -Acceleration = change in velocity/time interval
    -Velocity acquired = acceleration X time
    -The steeper an incline, the greater the acceleration.
    -Distance = 1/2 (acceleration X time X time)

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  9. Chapter 2
    1. Circular motion has no beginning or and.
    2. Natural motion could be either straight up or straight down.
    3. Another motion is violent motion, resulted from pushing or pulling forces.
    4. Nicolaus Copernicus formulated his theory of the moving earth.
    5. slope downward-speed increases, slope upward-speed decreases, and no slope the speed does not change.
    6. Changes in motion are produced by a force or combination of forces.
    7. In mathematical notation, the equilibrium rule is EF=0.
    8. An object moving at constant speed in a straight line path is also in equilibrium.
    9. Newton's first law that an object under the influence of only one force cannot be in equilibrium.
    10. When Copernicus announced the idea of a moving Earth. the concept of interia was not understood.

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  10. Chapter 3:
    1) Speed is the distance covered per unit of time.
    2) A constant speed means that the object is moving at the same speed.
    3) Acceleration applies to decrease as well as increase in velocity.
    4) Object fall because of the force of gravity.
    5) Galileo disproved many Aristotelian ideas.
    6) A force is defined as a push or pull.
    7) How quickly does "how fast" change? Acceleration.
    8) Motion is relative.
    9) Galileo was the first to measure speed using distance and time.
    10) You must know the speed and direction to know the velocity of an object.

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  11. 1. Motion is divided into two main classes: Natural and Violent motion.
    2. Natural motion could either be straight up or straight down.
    3. Natural motion could also be circular as in the case of celestial objects
    4. Aristotle thought objects should fall at speeds proportional to their wight, the heavier the object the faster it should fall.
    5. Violent motion is pushing or pulling forces.
    6. Violent motion is externally caused.
    7. Galileo found that a stone as heavy as another did not fall twice as fast.
    8. Objects with different weights that are drop at the same time fall together and hit the ground at the same time.
    9. Changes in motion are produced by a force or combination of forces.
    10. The sources of a force may be gravitational, electrical, magnetic, or muscular effort.

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  12. Chapter 2:
    1. Aristotle divided motion into two main classes:Natural motion and Violent motion.
    2. Natural motion could be either straight up or straight down, as in the case of all things on the Earth, or it could be circular, as in the case of celestial objects.
    3. Violent motion resulted from pushing or pulling forces, violent motion was imposed motion.

    Chapter 3:

    4. Any combination of distance and time units is legitimate for measuring speed; for motor(or long distance), the units kilometers per hour(km/h) or miles per hour(mi/mph) are commonly used.
    5. Since average speed is the whole distance covered divided by the total time of travel, it doesn't indicate the different speeds and variations that may have taken place during shorter time intervals.
    6. Constant velocity means both constant speed and constant direction.
    7.Galileo developed the concept of acceleration in his experiments on inclined planes.
    8. During each second of fall, the object gains a speed of 10 meters per second.
    9. Galileo found that the distance a uniformly accelerating object travels is proportional to the square of time.
    10. For freely falling objects, it is customary to use the letter G to represent the acceleration(because the acceleration is due to gravity).

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  14. Marcelino Sanchez
    Chapter#2
    Natural motion could be either straight up or straight down as in the case of all things in Earth or circular.
    violent motion was imposed motion pushing a cart winning a tug of war.
    Nicolaus

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  15. Chapter 2

    1) Nicolaus copernicus assumed that the earth and other planets circled the sun.
    2)Galileo found that a stone twice as heavy didnt fall twice as fast.
    3)When there is less friction,the motion of objects presisted for a longer time.
    4)An object continues to do watever it happens to be doing uless a force stops it.
    5)A force in the simplest scence is a push or pull.
    6)Net force is when more than a single force acts on a object.
    7)If copernicus, were correct earth would have travled 107,000 kilometers per hour to circle the sun in one year.
    8)Things in motion remain in motion if no unbalanced forces are acting upon it.
    9)Natural motion can be straight up or straight down.
    10)The vertical force of gravity affects only the vertical motion.

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  16. Chapter 2.
    4.Aristotle believed that different rules apply in the heavens, and he asserted that celestial bodies are perfect spheres made of a perfect and uhchanging substance, which he called quintessence.
    5.Aristotle's statements about motion were a beginning in scientific thought, and, although he did not consider them to be final words on the subject, his followers for nearly 2000 years regarded his views beyond question.
    6.Since it was evident to most thinkers until the sisteenth century that Earth must be in its proper place, and since a force capable of moving Earth was inconceivable, it seemed quite clear to them that Earth does not move.
    7.Aristotle twas an astute observer of nature, and he dealt with problems around him rather than with abstract cases that did not occur in his environment.
    8.When more than a single force acts on an object, its consider a net force.
    9.Net force can not be zero.
    10.The fact that the net force on the crate equals zero means that the force of friction must be equal and opposite site to our pushing force.


    Chapter 3.


    1.Everything moves, even things that appear to be at rest.
    2.The term acceleration applies to decreases as well to as increases in velocity.
    3.Anyone who has stood in a crowded bus has experienced the difference between velocity and acceleration.

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  17. Chapter 3

    1)Things in motion often have a diffrence in speed.
    2)Constant speed means steady speed.
    3)constant direction is a straight line-the objects path doesnt curve.
    4)If the speed or direction changes or both change or both change then the velocity changes.
    5)The key idea that defines acceleration is change.
    6)Acceleration applies ro decreases as well as to increasws in velocity.
    7)Galileo developed acceleration in his experiments on inclined planes.
    8)Galileo found greater accelerations for steeper inclines.
    9)Things fall because of the force of gravity.
    10)It is a common observation that many objects fall with unequal accelerations.

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  18. Chris Cirneros

    Chapter 2:
    1. Aristotle devided motion in two main classes: natural motion and violent motion
    2. Objects in the universe has its proper place, determined "nature" any object not in its proper place while "shive" to get there
    3. Natural motion: straight up or straight down.
    4. Violent motion: resets in pushing or pulling forces
    5. Galileo found that a stone twice as heavy as another one, will not fall twice as fast
    6. Galileo denied that an object needs a push or pull, for an object to keep moving by stating that. no interface on an object, it will keep moving in a straight line forever.
    7. Less friction will result in the motion of the object to last longer, the less the friction, the more the motion apparened at constant speed
    8. It losses speed rapidly, when it moves a steep slope.
    9. On a lesse slope it loses speed slowly and rolls for a longer time.
    10. friction force must be equal and opposite to our pushing curve.

    Chapter 3:
    1. Speed is measured by considering the distance covered and the time it takes.
    2. Motion is realation
    3. When a distance in kilometers is divide by a time in hours, the answer is in kolometer per average.
    4. The average speed is known as distance
    5. When we know,both the speed and direction of an object know its velocity
    6. Velocity is now fast and in what direction.

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  19. 7. Galileo developed acceleration in his experiments on inclined planes.
    8. Galileo found that the distance a uniformly accelerating object travels is proportional to the square of time.
    9. Distance = 1/2 (acceleration X time X time)
    10. You must know the speed and direction to know the velocity of an object.

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  20. Chapter 2
    1. There are two main classes Aristotle divided motion into- natural and violent motion.
    2. Aristotle stated that natural motion proceeds from nature of an object, dependent on a combination of the four elements the object contains. (water, earth, fire, air)
    3. Natural motion could be either straight up or down- as in a case of all things on earth or circular- as in case of celestial objects.
    4. Aristotle believed that different rules apply in the heavens, and he asserted that celestial bodies are perfect spheres made of a perfect and unchanging substance. Which he called quintessence.
    5. Aristotle- greek philosopher, scientist and educator, son of physician who personally served the king of Macedonia.
    6. Copernicus formulated a theory that Earth and all the other planets revolved around the Sun.
    7.Newton's first law states that an object at rest or in uniform motion unless it is compelled to change by forces impressed upon it.
    8. Changes in motion are produced by a force or combination of forces.
    9. When the net force of something is zero, it is defined as being in mechanical equilibrium.
    10. Newton's first law, law of inertia, states that every object stays still or continues in a straight line unless it is changed by any force upon it.


    Chapter 3

    1.Any combination of distance and time units is legitimate for measuring speed; for motor(or long distance), the units kilometers per hour or miles per hour are commonly used.
    2. Things in motion have different speed.
    3. Constant velocity means: constant speed and constant direction.
    4.The term acceleration applies to decreases as well to as increases in velocity.
    5. Acceleration is change in velocity/time interval.
    6. A Force can be gravitational, electrical, magnetic, or muscular.
    7. A Net Force is when there is more than one force upon an object.
    8. There are different units for speed.
    9. A Vector Quantity is when a force has magnitude and direction.
    10. What makes acceleration so complex is that it is a rate of a rate.

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  21. Ch.3
    1.Everything moves-even things that appear not to be moving.
    2.Vector quantity is when a force has magnitudeand direction.
    3.Constant velocity means both constant speed and constant direction.
    4.Free fall is when an object is falling without any friction.
    5.Acceleration applies to decreases as well as to increase in velocity.
    6.Acceleration also occurs whenever something moves in a curve path,even if its moving at a constant speed.
    7.We are moving 107,000 kilometers per hour to the sun.
    8.The speed at any istant is the instantaneous spee.
    9.Speed is measured by cosidering the distance covered and the time it takes.
    10.Constant direction is a straigh line-the objects path dont curve.

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  22. 1. Aristotle divided motion into two main classes: Natural motion & Violent motion.
    2. Natural motion could be either straight up or straight down.
    3. Circular motion has no beginning or end, repeating itself without deviation.
    4. Violent motion, resulted from pushing or pulling forces.
    5. Concept of violent motion, push & pull were not always evident.
    6. The essential thing about violent motion was that extermally caused & was imparted to object.
    7. Violent motion was imposed motion.
    8. A person pushing a cart or lifting a heavy weight imposed motion.
    9. Galileo found that a stone twice and heavy did not fall twice as fast.
    10. Newton improved Galileo idea & made his first law, called law of inertia.

    Chapter 3
    1. Everything moves even things that appear to be at rest.
    2. You're moving at about 107.000 kilo meters per hour relative to the sun.
    3. Galileo defined speed as the distance covered per unit of time S= d/t.
    4. Any combination of distance & time units is legitimate for measuring speed; for motor vehicles.
    5. The speed at any instants is the instantaneous speed.
    6. Something with constant speed doesn't speed up or slow down.
    7. If either the speed or direction changes, then the velocity changes.
    8. Acceleration applies to decrease as well to increase in velocity.
    9. Things fall because the force of gravity.
    10. It took nearly 2000 years from the time of Aristotle to reach a clear understanding of motion.

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  23. 1.Aristole divided motion into two main classes:Natrual motion and violent motion.
    2.Natrual motion could be straight up or dowm.
    3. violent motion it resulted from pushing or lifting heavy weight.
    4. Circular motion has no begening or end.
    5.violent motion was imposed motion
    6.Galileo found that a stone twice and heavy did not fall twice as fast.
    7.A person pusing a cart or lifting a heavy weightimposed motion.
    8.Newtonimproved galileo idea and made his first law, ccalled law of inertia
    9.violent motion has its difficulties for the pushes and pulls
    10.object in the universe has its proper place determined nature any object not in its proper place while shive to get there



    chapter3
    1.everything moves even things that appear to be at rest.
    2.your moving abot 107.000 kilo meters per hour relative to the sun
    3.galileo defined speed as the distance covered per unit of time S= d/t
    4.Any combination distance and time units id legitimate for measuring sped; for motor vehicles
    5.the dspeed at any instant is the instantaneous speed.
    6.someting with constant speed doesn't speed up or slow down
    7.the speed or direction changes, then the velocity changes
    8.acceleration applies to decrease as well to increase in velocity
    9.there are different units for speed
    10.things fall because of the force of gravity

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