CPL.Luke Posted November 28, 2006 Share Posted November 28, 2006 on the subject of SI versus imperial units I'm a freshman physis major in the US, and the last time I saw an imperial unit in a science classroom I was in grade school (up to age 14 in US) Physics ust doesn't make sense without SI units, who the hell woul want to measure mass in slugs? Link to comment Share on other sites More sharing options...
Ragib Posted November 28, 2006 Share Posted November 28, 2006 I don't have any time to exacts right now, but I'd imagine Number 3 would be solved like this: F=ma, since mass in constant, change the F to a, and adjust. Since a is constant till 0.04, use v=u+at. After that express it as a function of time, integrate to achieve velocity, substitute 0.08 into that equation. Link to comment Share on other sites More sharing options...
Ragib Posted November 28, 2006 Share Posted November 28, 2006 Ok don't laugh I realised i did have a tiny bit of time. I basically did what i said before, and i get v= 714.285714285 repeating 714285. Am i correct? Link to comment Share on other sites More sharing options...
Klaynos Posted November 28, 2006 Share Posted November 28, 2006 EvoN1020v mind if I post next weeks question? Link to comment Share on other sites More sharing options...
EvoN1020v Posted November 28, 2006 Author Share Posted November 28, 2006 Ok don't laugh I realised i did have a tiny bit of time. I basically did what i said before, and i get v= 714.285714285 repeating 714285. Am i correct? Very good Ragib. The answer is [math]714 m/s[/math]. I'll put up the complete solution for this question when I have the time, or I can wait for other people to attempt the question themselves. EvoN1020v mind if I post next weeks question? You're welcome to post a new question in 2 weeks' time. Blike just e-mailed me saying that he will re-create the front page with a featured physics questions thread on it. I'll post the first question, and then you can post a question after that. Cool with you? Link to comment Share on other sites More sharing options...
Klaynos Posted November 28, 2006 Share Posted November 28, 2006 Very good Ragib. The answer is [math]714 m/s[/math]. I'll put up the complete solution for this question when I have the time, or I can wait for other people to attempt the question themselves. You're welcome to post a new question in 2 weeks' time. Blike just e-mailed me saying that he will re-create the front page with a featured physics questions thread on it. I'll post the first question, and then you can post a question after that. Cool with you? Yep sure... Link to comment Share on other sites More sharing options...
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