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princessharry
 Level 0 Comments: Untouched account Offline  Send mail to princessharry Block princessharry Invite princessharry to be your friend |
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latest user's comments
| #1 - Lies: www.johnsonsbaby.com/johnsons-difference/best-for-baby-… | 02/08/2013 on WELL. | 0 |
| #47 - Actually, I failed to take into account the attraction between… | 01/22/2013 on Question | +1 |
| #46 - Following on from that... i believe op is right. Imag… [+] (1 new reply) | 01/22/2013 on Question | +1 |
| #47 -
princessharry (01/22/2013) [-] Actually, I failed to take into account the attraction between the hammer and the feather themselves! The feather will accelerate faster than the hammer due to their attraction (due to its smaller mass but same force) offsetting the Earths acceleration towards the hammer. Op is wrong actually, they would fall at the same rate relative to the Earth | ||
| #45 - Simple thought experiment here for you. Only equations you nee… [+] (5 new replies) | 01/21/2013 on Question | +1 |
| #53 -
N. Korean citizen (01/25/2013) [-] 1 * 2 * 2 / 1 ^ 2 = 4 4 / 2 = 2 m/s^2 1 * 4 * 4 / 1 ^ 2 = 16 16 / 8 = 2 m/s^2 Same answer, but rules of OCD wouldn't let me let this lie. #54 -
N. Korean citizen (01/25/2013) [-] 1 * 2 * 2 / 1 ^ 2 = 4 4 / 2 = 2 m/s^2 1 * 4 * 4 / 1 ^ 2 = 16 16 / 8 = 2 m/s^2 Sorry; I didn't realize white space would get nuked. #55 -
N. Korean citizen (01/25/2013) [-] Wait, why did I just divide by 8? I'm a dumbass. 1 * 2 * 2 / 1 ^ 2 = 4 then 4 / 2 = 2 m/s^2 1 * 4 * 4 / 1 ^ 2 = 16 then 16 / 4 = 4 m/s^2 There seems to be a problem here. Maybe we should be doing a = F / (m1 + m2) ? 1 * 2 * 2 / 1 ^ 2 = 4 then 4 / (2 + 2) = 1 m/s^2 1 * 4 * 4 / 1 ^ 2 = 16 then 16 / (4 + 4) = 2 m/s^2 Either way, the two heaver objects seem to be accelerating faster than the two light ones. #46 -
princessharry (01/22/2013) [-] Following on from that... i believe op is right. Imagine if the hammer and the feather were on opposite sides of the planet. But also let us, for ease of thought experiment, imagine that the hammer and the feather are massive so that the earth is 4000 kg, the hammer is 2000 kg and the feather is 200 kg. The earth being in the centre of the two, is going to have a resultant force on it in the direction of the hammer. Therefore, although both the hammer and the feather are accelerating towards the centre of mass at the same rate (in a real world example that would pretty much be the centre of the earth because it has 99.999...% of the mass), the earth is accelerating towards the hammer and away from the feather. Therefore, the hammer and earth would collide before the hammer and the feather. just because the mass distribution is different in a real world example, the principles can be carried forward. When 2 objects of different masses are dropped from the same direction (eg right next to eachother), they collide with the 3rd object (eg Earth/Jupiter etc) at the same time (fall at the same rate) when they are dropped from different directions (eg on opposite sides of the object) , they collide with the 3rd object at different times and fall at a different rate (from the point of view of the 3rd object) even though they accelerate at the same rate. Not well explained i know, but hey, its late in the UK! #47 -
princessharry (01/22/2013) [-] Actually, I failed to take into account the attraction between the hammer and the feather themselves! The feather will accelerate faster than the hammer due to their attraction (due to its smaller mass but same force) offsetting the Earths acceleration towards the hammer. Op is wrong actually, they would fall at the same rate relative to the Earth | ||
| #227 - too* HEIL GRAMMAR! | 01/07/2013 on LOTR | 0 |
| #3 - There was a wizard of oz 2... it was called return to oz | 01/02/2013 on Wizard of Oz | 0 |
| #356 - Actually it's the sound of the first letter in a word that dec… | 11/28/2012 on the life of a hero | 0 |
