ladyskydiver 0 #1 February 14, 2006 [rant] Ok...I want to know. Who hid it? Why can I not find the key to unlocking physics? ARG!!! The math is simple. Easy...no problem - even with it being calc based. The whole figuring out the problem and what it is asking for....that's another story. Biology...chemistry...etc....no worries...easy breezy. Physics? Yikes! It shouldn't be that hard. It's not asking difficult concepts or asking to solve ridiculous things. I've got a tutor and hopefully, he'll help me find the key. [/rant] Ok...rant off.Life is short! Break the rules! Forgive quickly! Kiss slowly! Love truly, Laugh uncontrollably. And never regret anything that made you smile. Quote Share this post Link to post Share on other sites
NWFlyer 2 #2 February 14, 2006 Quotehe'll help me find the key. It's right where you left it. Under the mail on the kitchen counter. Oh... different kind of key. Good luck with that! I haven't taken a physics class since high school... can't help ya. "There is only one basic human right, the right to do as you damn well please. And with it comes the only basic human duty, the duty to take the consequences." -P.J. O'Rourke Quote Share this post Link to post Share on other sites
Taylor610 0 #3 February 14, 2006 I've got a tutor and hopefully, he'll help me find the key. *** Send Darkwing a PM, he is like a Dr. of Physics Quote Share this post Link to post Share on other sites
Mike111 0 #4 February 14, 2006 I stole it... i have to be honest Quote Share this post Link to post Share on other sites
Girlfalldown 0 #5 February 14, 2006 QuoteI stole it... i have to be honest Well at least you're an honest theif. -------------- (Do not, I repeat DO NOT, take my posts seriously.) Quote Share this post Link to post Share on other sites
Mike111 0 #6 February 14, 2006 oh definately. (thieving is an honest living!!!!) lollolol Quote Share this post Link to post Share on other sites
tso-d_chris 0 #7 February 14, 2006 QuoteThe whole figuring out the problem and what it is asking for....that's another story. I bet you never liked word problems in math class, did you? What topics in Physics are you working with? There are a number of people on DZ.com well qualified to help you. (Dr.) Kallend and Billvon come to mind immediately, and I believe lostinspace has a pretty good handle on the stuff as well, IIRC. How busy any of them are is a totally different question. Good luck. For Great Deals on Gear Quote Share this post Link to post Share on other sites
2fat2fly 0 #8 February 14, 2006 It's in the box with the catI am not the man. But the man knows my name...and he's worried Quote Share this post Link to post Share on other sites
Mike111 0 #9 February 14, 2006 bahhhh..... why did you tell where i hid it!!!!! Quote Share this post Link to post Share on other sites
twibbles 0 #10 February 14, 2006 QuoteIt's in the box with the cat I think that the key IS the cat, but which one you get depends on which way the function collapses... Eugene . "In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move." Quote Share this post Link to post Share on other sites
simplyputsi 0 #11 February 14, 2006 changed my major because of physics. Good Luck!!!Skymama's #2 stalker - Quote Share this post Link to post Share on other sites
Remster 30 #12 February 14, 2006 QuoteIt's in the box with the cat Are you certain?Remster Quote Share this post Link to post Share on other sites
waltappel 1 #13 February 14, 2006 Well that kind of sucks!!! You're not giving us any of the problems that are driving you crazy?!!! C'mon--we're here to help and/or laugh at your pain! Seriously, the key is pattern recognition. Walt Quote Share this post Link to post Share on other sites
thegreekone 0 #14 February 14, 2006 Biology...chemistry...etc....no worries...easy breezy. Quote I will vouch for that Quote Share this post Link to post Share on other sites CSpenceFLY 1 #15 February 14, 2006 Did you loose the remote?Or are the batteries dead? . Quote Share this post Link to post Share on other sites Samurai136 0 #16 February 14, 2006 Physics story problems.... 1. F=ma 2. Draw a force diagram. 3. Purchase a copy of the Schaum's Outline Series. Try Beginning Physics I and II or College Physics. You might try the 3000 Solved Problems in Physics. The Shaum's series are renowned for clearly teaching the problem solving techniques for physics story problems."Buttons aren't toys." - Trillian Ken Quote Share this post Link to post Share on other sites ladyskydiver 0 #17 February 15, 2006 QuoteWell that kind of sucks!!! You're not giving us any of the problems that are driving you crazy?!!! C'mon--we're here to help and/or laugh at your pain! Seriously, the key is pattern recognition. Walt k...here's a problem... Two blocks are connected over a frictionless, massless pulley on an incline with block A on the incline and block B hanging by a string over the pulley. The mass of block A is 12 kg and the coefficient of kinetic friction between A and the incline is 0.25. Angle is 30. Block A slides down the incline at a constant speed. What is the mass of block B? Thanks for the laughs and pointers/leads, everyone. You guys rock!!!!!!!!!!Life is short! Break the rules! Forgive quickly! Kiss slowly! Love truly, Laugh uncontrollably. And never regret anything that made you smile. Quote Share this post Link to post Share on other sites NWFlyer 2 #18 February 15, 2006 QuoteWhat is the mass of block B? 42. Quote Share this post Link to post Share on other sites CSpenceFLY 1 #19 February 15, 2006 I agree. . Quote Share this post Link to post Share on other sites Bolas 5 #20 February 15, 2006 QuoteTwo blocks are connected over a frictionless, massless pulley on an incline with block A on the incline and block B hanging by a string over the pulley. The mass of block A is 12 kg and the coefficient of kinetic friction between A and the incline is 0.25. Angle is 30. Block A slides down the incline at a constant speed. What is the mass of block B? Ohhhhh baby that is sooo hot, you make me tingle. I love it when you talk nerdy to me. Stupidity if left untreated is self-correcting If ya can't be good, look good, if that fails, make 'em laugh. Quote Share this post Link to post Share on other sites MrBrant 0 #21 February 15, 2006 f = ma. constant speed = 0 accelleration, = Zero force then, the earth blew up. Quote Share this post Link to post Share on other sites happythoughts 0 #22 February 15, 2006 Always draw the picture. Once you label all the stuff, it really helps to clear it up. After class, I always went to the physics lab and started the homework. They always had a graduate teach assistant there. Any problems and I asked them. Quote Share this post Link to post Share on other sites ladyskydiver 0 #23 February 15, 2006 I drew the free-body diagrams on both block A and B. Block B has tension up and mass*gravity down. Block A has mass*gravity down, Fn up, tension to the right leading up to the pulley and down to block B, and friction moving up as well (since the block is moving down and friction always goes against motion). Now...I know that mgsin30 and mgcos30 are in the equations for block A. I, also, know that Block B only has movement in the y direction but not x direction. And block B has movement in both x and y direction. But...I'm missing how to put it all together.Life is short! Break the rules! Forgive quickly! Kiss slowly! Love truly, Laugh uncontrollably. And never regret anything that made you smile. Quote Share this post Link to post Share on other sites thegreekone 0 #24 February 15, 2006 Thanks for the laughs... Quote oh, so I'm funny? Funny, how? Quote Share this post Link to post Share on other sites Samurai136 0 #25 February 15, 2006 You are almost there. The net force... Net Force moving at a constan speed down the slope= Mg(Sin30)+ (coeff of kinetic friction* Mg(sin30))=mg M= mass of block A m= mass of block b Solve for mass of block m. The force of kinetic friction is the force that is applied to the block when it is just beginning to slide down the 30 degree slope. Make sense?Edit: (12*9.803*sin30)+((.25)*12*9.803*sin30)=m*9.803 m=7.5kg I could be wrong..."Buttons aren't toys." - Trillian Ken Quote Share this post Link to post Share on other sites Join the conversation You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. 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CSpenceFLY 1 #15 February 14, 2006 Did you loose the remote?Or are the batteries dead? . Quote Share this post Link to post Share on other sites
Samurai136 0 #16 February 14, 2006 Physics story problems.... 1. F=ma 2. Draw a force diagram. 3. Purchase a copy of the Schaum's Outline Series. Try Beginning Physics I and II or College Physics. You might try the 3000 Solved Problems in Physics. The Shaum's series are renowned for clearly teaching the problem solving techniques for physics story problems."Buttons aren't toys." - Trillian Ken Quote Share this post Link to post Share on other sites
ladyskydiver 0 #17 February 15, 2006 QuoteWell that kind of sucks!!! You're not giving us any of the problems that are driving you crazy?!!! C'mon--we're here to help and/or laugh at your pain! Seriously, the key is pattern recognition. Walt k...here's a problem... Two blocks are connected over a frictionless, massless pulley on an incline with block A on the incline and block B hanging by a string over the pulley. The mass of block A is 12 kg and the coefficient of kinetic friction between A and the incline is 0.25. Angle is 30. Block A slides down the incline at a constant speed. What is the mass of block B? Thanks for the laughs and pointers/leads, everyone. You guys rock!!!!!!!!!!Life is short! Break the rules! Forgive quickly! Kiss slowly! Love truly, Laugh uncontrollably. And never regret anything that made you smile. Quote Share this post Link to post Share on other sites
NWFlyer 2 #18 February 15, 2006 QuoteWhat is the mass of block B? 42. Quote Share this post Link to post Share on other sites
CSpenceFLY 1 #19 February 15, 2006 I agree. . Quote Share this post Link to post Share on other sites
Bolas 5 #20 February 15, 2006 QuoteTwo blocks are connected over a frictionless, massless pulley on an incline with block A on the incline and block B hanging by a string over the pulley. The mass of block A is 12 kg and the coefficient of kinetic friction between A and the incline is 0.25. Angle is 30. Block A slides down the incline at a constant speed. What is the mass of block B? Ohhhhh baby that is sooo hot, you make me tingle. I love it when you talk nerdy to me. Stupidity if left untreated is self-correcting If ya can't be good, look good, if that fails, make 'em laugh. Quote Share this post Link to post Share on other sites
MrBrant 0 #21 February 15, 2006 f = ma. constant speed = 0 accelleration, = Zero force then, the earth blew up. Quote Share this post Link to post Share on other sites
happythoughts 0 #22 February 15, 2006 Always draw the picture. Once you label all the stuff, it really helps to clear it up. After class, I always went to the physics lab and started the homework. They always had a graduate teach assistant there. Any problems and I asked them. Quote Share this post Link to post Share on other sites
ladyskydiver 0 #23 February 15, 2006 I drew the free-body diagrams on both block A and B. Block B has tension up and mass*gravity down. Block A has mass*gravity down, Fn up, tension to the right leading up to the pulley and down to block B, and friction moving up as well (since the block is moving down and friction always goes against motion). Now...I know that mgsin30 and mgcos30 are in the equations for block A. I, also, know that Block B only has movement in the y direction but not x direction. And block B has movement in both x and y direction. But...I'm missing how to put it all together.Life is short! Break the rules! Forgive quickly! Kiss slowly! Love truly, Laugh uncontrollably. And never regret anything that made you smile. Quote Share this post Link to post Share on other sites
thegreekone 0 #24 February 15, 2006 Thanks for the laughs... Quote oh, so I'm funny? Funny, how? Quote Share this post Link to post Share on other sites Samurai136 0 #25 February 15, 2006 You are almost there. The net force... Net Force moving at a constan speed down the slope= Mg(Sin30)+ (coeff of kinetic friction* Mg(sin30))=mg M= mass of block A m= mass of block b Solve for mass of block m. The force of kinetic friction is the force that is applied to the block when it is just beginning to slide down the 30 degree slope. Make sense?Edit: (12*9.803*sin30)+((.25)*12*9.803*sin30)=m*9.803 m=7.5kg I could be wrong..."Buttons aren't toys." - Trillian Ken Quote Share this post Link to post Share on other sites Join the conversation You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. Reply to this topic... × Pasted as rich text. Paste as plain text instead Only 75 emoji are allowed. × Your link has been automatically embedded. Display as a link instead × Your previous content has been restored. Clear editor × You cannot paste images directly. Upload or insert images from URL. Insert image from URL × Desktop Tablet Phone Submit Reply 0
Samurai136 0 #25 February 15, 2006 You are almost there. The net force... Net Force moving at a constan speed down the slope= Mg(Sin30)+ (coeff of kinetic friction* Mg(sin30))=mg M= mass of block A m= mass of block b Solve for mass of block m. The force of kinetic friction is the force that is applied to the block when it is just beginning to slide down the 30 degree slope. Make sense?Edit: (12*9.803*sin30)+((.25)*12*9.803*sin30)=m*9.803 m=7.5kg I could be wrong..."Buttons aren't toys." - Trillian Ken Quote Share this post Link to post Share on other sites
