cookbeat01 Posted January 14, 2006 Share Posted January 14, 2006 I have some questions, 1. What would happen if newton's first law were violated? 2. What would happen if newton's second law were violated? 3. What would happen if newton's third were violated? Also, what would happen if forces were not equal in magnitude and acted in the same direction? I know that in Newton's third law were violated, the conservation of momentum would not be valid. Please don't answer by talking about the conservation of momentum. Link to comment Share on other sites More sharing options...
danny8522003 Posted January 14, 2006 Share Posted January 14, 2006 You cant break physical laws and expect others to still hold. This is just the same as a "what would happen if we were moving at faster than light [...]?" question, you cant so it's pointless asking about it. Link to comment Share on other sites More sharing options...
5614 Posted January 14, 2006 Share Posted January 14, 2006 The world wouldn't be how it is today. How would they be violated in this hypothetical and impossible world of yours? Would F=ma become F=2ma or F=(1/2)ma ??? Big difference. And what is the point in theorising if the universe was totaly different what it would be like... it could be like anything you could possibly imagine. Link to comment Share on other sites More sharing options...
Sisyphus Posted January 14, 2006 Share Posted January 14, 2006 F=2ma is equivalent to F=ma if you just change your units, since both just mean force varies as mass times acceleration. Now, if you were to change it to F=(m^2)a or something.... Sorry, I'm enjoying be a jerk today. Your point is still true. Link to comment Share on other sites More sharing options...
5614 Posted January 14, 2006 Share Posted January 14, 2006 Yes but F varies at a different rate to ma and so for 2ma twice the force is required, this is the difference I was referring to. Link to comment Share on other sites More sharing options...
Sisyphus Posted January 15, 2006 Share Posted January 15, 2006 Measured with what units? You're talking about quantities of different things, so they're only "equal" in terms of agreed upon units. I could pick any arbitrary unit for an amount of force, for example, and it could still be true depending on what coefficient I use. The expression "F=ma" is either assuming what units you're using (although that isn't expressed), or it really means "varies as" instead of "is equal to." So there. Link to comment Share on other sites More sharing options...
insane_alien Posted January 15, 2006 Share Posted January 15, 2006 S.I. Units Link to comment Share on other sites More sharing options...
Sisyphus Posted January 15, 2006 Share Posted January 15, 2006 That was a rhetorical question... Link to comment Share on other sites More sharing options...
5614 Posted January 15, 2006 Share Posted January 15, 2006 lol, yeah... SI units! Sorry, I'm enjoying be a jerk today Link to comment Share on other sites More sharing options...
NeonBlack Posted February 6, 2006 Share Posted February 6, 2006 Yeah, Sisyphus is right. Since you want SI units so badly, consider that a 'newton' is just the force required to accelerate a mass of 1 kg at 1 m/s^2. If you say f=2ma, what does this change? Link to comment Share on other sites More sharing options...
SilentQ Posted February 6, 2006 Share Posted February 6, 2006 It is circular reasoning. One newton is defined as the force required to produce an acceleration of one metre per second squared in a mass of one kilogramme. Changing Newton's second law would change the definition of a newton, in such a way as [math]F=ma[/math] still held. Link to comment Share on other sites More sharing options...
Tom Mattson Posted February 6, 2006 Share Posted February 6, 2006 I have some questions' date=' 1. What would happen if newton's first law were violated? 2. What would happen if newton's second law were violated? 3. What would happen if newton's third were violated? Also, what would happen if forces were not equal in magnitude and acted in the same direction? [/quote'] Just look at any experiment in which quantum effects are manifest. Then you'll see what happens when all of Newton's laws are violated. Link to comment Share on other sites More sharing options...
douxt Posted February 8, 2006 Share Posted February 8, 2006 Right. Learn sth such as Quantum Mechanics or even String theory ,maybe you'll know Newton's laws are not always correct. i think you have really good ideas and such questions are really needed. Link to comment Share on other sites More sharing options...
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