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by: HaleyG

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# PHYS 1010 Week 2 Notes PHYS 1010-01

Marketplace > Tulane University > Physics 2 > PHYS 1010-01 > PHYS 1010 Week 2 Notes
HaleyG
Tulane
GPA 3.6

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Lecture notes
COURSE
Great Ideas in Science & Tech
PROF.
Timothy Schuler
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
Schuler, Great ideas in science and tech
KARMA
25 ?

## Popular in Physics 2

This 2 page Class Notes was uploaded by HaleyG on Friday January 22, 2016. The Class Notes belongs to PHYS 1010-01 at Tulane University taught by Timothy Schuler in Fall 2016. Since its upload, it has received 47 views. For similar materials see Great Ideas in Science & Tech in Physics 2 at Tulane University.

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Date Created: 01/22/16
PHYS 1010 Notes Week 2 Jan 20­22 Vectors and Coordinate Systems Motion ­ Mechanics: the general term for the branch of physics which deals with the  motion of objects, and the forces that cause motion ­ Kinematics: basic principles of how an object moves without taking  forces into consideration ­ Motion: the change of an object's position within some time ­ Galileo ­ Developed foundation for describing physical motion ­ Relationships between four physical properties: time, position, velocity,  and acceleration Position and time ­ Measure position by placing an arbitrary coordinate system (reference point)  around the object and describing the position as an (x, y) coordinate ­ Coordinate systems are created, not natural ­ Time also behaves as a coordinate system and can be defined arbitrarily as well ­ Vector: an arrow that describes a property within a given coordinate system and  describes two pieces of information: magnitude (how much?) and direction (where?) ­ Straight lines that describe properties at their origin ­ Length: distance ­ Direction: location ­ Provides information about changes in position (displacement) ­ Displacement is independent of any coordinate system ­ Adding/subtracting vectors requires that we use specific rules to maintain the magnitude/direction of the resultant vector ­ Add vectors "tip to tail" and new vector is drawn from the  beginning of the first vector to the end of the other  ­ Properties of vectors ­ Two vectors are equal if they have the same magnitude and  direction, regardless of the starting point of the vector ­ Scalar: numbers/units that describe a magnitude of physical quantity ­ Vectors describe both magnitude and direction ­ Breaking vectors into their components  simplifies adding a bunch of vectors together  to get the resultant vectors ­ Change to A  does not affect A  and vice versa x y Velocity ­ Time interval measures the amount of time taking place between two events  (Final Time ­ Initial time = Change in time) ­ Time is not a vector (does not have direction) ­ Velocity: how fast an object is moving (speed and direction) ­ Velocity = (displacement vector) / (change in time) ­ Average velocity vector will point in same direction as displacement  vector Acceleration: change in velocity with time ­ Can occur with either a change in magnitude or direction of velocity vector ­ Acceleration = (change in velocity) / (change in time) Instantaneous velocity ­ Equations for velocity and acceleration work if we are measuring uniform  motion: motion that does not change over time ­ Instantaneous motion: immediate motion at some precise moment in time ­ Average velocity = (total displacement) / (change in time) ­ Instantaneous measurements are determined with calculus: limits,  derivatives, and integrals ­ Area under velocity curve = position ­ Gravity  ­ Every object is being accelerated by gravity at the same constant rate ­ If we throw an object, gravity acts on that object and it decelerates until  it reaches zero velocity, and then the gravitational acceleration will make the ball move  back in a downward direction to it's original position ­ Projectile motion: moving up or down AND left or right ­ Vertical acceleration does not affect horizontal velocity

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