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Lecture Notes Week Two Phy 101

by: Bryce Caplan

Lecture Notes Week Two Phy 101 PHY 101 - M001

Marketplace > Syracuse University > Physics 2 > PHY 101 - M001 > Lecture Notes Week Two Phy 101
Bryce Caplan
Major Concepts of Physics I
K. Foster

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About this Document

Notes covering graphing, useful equations, and the freefall demo.
Major Concepts of Physics I
K. Foster
Class Notes
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This 3 page Class Notes was uploaded by Bryce Caplan on Sunday September 13, 2015. The Class Notes belongs to PHY 101 - M001 at Syracuse University taught by K. Foster in Fall 2015. Since its upload, it has received 40 views. For similar materials see Major Concepts of Physics I in Physics 2 at Syracuse University.

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Date Created: 09/13/15
Physics 101 Lecture 3 090915 Acceleration Acceleration is a change in velocity over time If acceleration is given the letter a and velocity is given v and time is given then acceleration described as the change in velocity over the change in time would be written as a AvAt An acceleration versus time graph would be represented by time as the independent variable and acceleration as the dependent variable The velocity can be found by calculating the area under the curve of the acceleration function this should require only basic algebra if not see a calculus student or the professor The slope at any point in a position versus time graph is the acceleration at that point and in a velocity versus time graph is the acceleration at that point Acceleration versus time graph r mnn EJEEE IE l39 ii l39 l d ti l i Velocity Time a Velocity versus time graph eldcity Fu Fiction ti s iH i Distance Travelled Time Gravity will accelerate a wheel down a slope constantly increasing the velocity at which it travels A ball thrown in the air is constantly accelerating downward from the release of the ball until it hits the ground A downward acceleration means that the ball is going faster toward the ground but it still goes up in the air because it starts with a velocity that goes away from the ground Various useful equations xx0v0t05at2 The position of an object moving in one dimension at a specific time with a uniform acceleration initial velocity and initial position is equal to the original position of the object plus the initial velocity multiplied by the time plus one half the acceleration multiplied by the time squared 2 X 5 61 The position of an object moving in one dimension is equal to the velocity squared divided by twice the acceleration x05at2 The position of an object moving in one dimension with a constant acceleration is equal to one half of the acceleration multiplied by time squared vat The velocity of an object accelerating in one dimension is equal to the acceleration multiplied by the time v2 123 2ax x 0 The velocity squared of an object moving in one dimension with an initial velocity and a constant acceleration is equal to the initial velocity of that object squared plus twice the acceleration multiplied by the change in position Freefall Demo Two reasonable objects dropped at the same time from the same height would hit the ground at the same time if air resistance were not a factor The reason why it appears that lighter objects fall slower than heavier objects is because lighter objects don t exert as much force on the air as heavier objects do resulting in air resistance that prevents the lighter objects from hitting the ground as quickly as heavy objects do In the absence of air such as in a vacuum or on the moon the air resistance becomes negligible so the objects fall at approximately the same speed approximately because they do not fall at the exact same speed but the difference is so small that in practicality it makes sense that they fall at the same speed The acceleration of objects on Earth is approximately effectively for our purposes 98 ms2


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