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latest user's comments
|#70 - Is nobody acknowledging the fact that Germany was voted both m… [+] (1 new reply)||07/28/2014 on THAT'S IT, NO MORE MONEY...||0|
|#178 - i work in as a server in a restaurant and i get paid 2.25 an h… [+] (2 new replies)||05/17/2014 on Justice||0|
#186 - anonymous (05/17/2014) [-]
in California there is a state minimum wage, and the department of labor records that California does not allow tips to substitute as wage payed, so regardless of what she gets in tips she's still earning at least $8 from her employers, any tips are icing on the cake.
|#37 - Work is fun, boring, but fun. [+] (2 new replies)||01/24/2013 on Hemp||+13|
|#9 - what the description is saying||01/18/2013 on Smart kid||+2|
|#106 - **cgould rolled a random image posted in comment #1362315 a…||11/11/2012 on Everything... Everything...||0|
|#5 - Comment deleted [+] (1 new reply)||10/23/2012 on Angel||+4|
|#39 - Picture [+] (2 new replies)||10/11/2012 on win||+9|
|#14 - oh yeah this post was soooo funny, you should post more just like it [+] (2 new replies)||10/06/2012 on Sarcasm||+39|
|#62 - Comment deleted||09/29/2012 on scientific||-2|
|#60 - the direction of the motion does not make an acceleration posi… [+] (4 new replies)||09/29/2012 on scientific||0|
#77 - commiecomrade (09/29/2012) [-]
Acceleration has magnitude and direction. It is a vector quantity.
en.wikipedia.org/wiki/Acceleration (2nd sentence)
The direction of motion is indeed independent on whether positive or negative, but differing signs indicate whether the SPEED of the object is increasing or decreasing. (speed is merely a magnitude of velocity and can be thought of as the absolute value of velocity).
Positive velocity with negative acceleration results in decreasing speed. Negative velocity with negative acceleration results in increasing speed.
The way this picture works is that Einstein says it's accelerating TOWARDS his floor at acceleration g. Therefore, the positive end of the axis is defined as downward, making a downward acceleration positive.
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