thepixiesrock Posted September 10, 2006 Share Posted September 10, 2006 (edited) A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5m long. The bowler hears the sound of the ball hitting the pins 2.50 seconds after the ball is released from his hands. What is the speed of the ball? the speed of sound is 340m/s. How do I do this? Edited September 10, 2006 by thepixiesrock Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there. Link to comment Share on other sites More sharing options...
metadigital Posted September 10, 2006 Share Posted September 10, 2006 Take off the sound bit. ∴ 2.5 seconds (total time) take away 16.5 OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT Link to comment Share on other sites More sharing options...
Surreptishus Posted September 10, 2006 Share Posted September 10, 2006 (edited) High school problem so i am assuming closed system and bowling lane is smooth etc. 2.5s= time for sound to travel to bowler+ time for ball to hit the pins. ^ if thats right it should be a big hint. edit: crap i got beat by meta. Well i was trying to help pixies work it out for himself. Edited September 10, 2006 by Surreptishus Link to comment Share on other sites More sharing options...
thepixiesrock Posted September 10, 2006 Author Share Posted September 10, 2006 Hey, thanks. Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there. Link to comment Share on other sites More sharing options...
thepixiesrock Posted September 10, 2006 Author Share Posted September 10, 2006 At highway speeds, a particular automobile is capable of an acceleration of about 1.6m/s^2. At this rate, how long does it take to accelerate from 80 km/h to 110 km/h? So like, something along the lines of 110-80= 30km/h, and then do something with the 1.6 m/s? So how long does it take him to accelerate a velocity of positive 30 km/h, if he accelerates 1.6 meters every second? How long does it take him to accelerate a velocity of positive 8.34 m/s, if he accelerates 1.6 meters every second? 8.34/1.6 = 5.215 seconds. Is that right? Or did I go wrong somewhere? Because I'm really having trouble focusing right now. Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there. Link to comment Share on other sites More sharing options...
Surreptishus Posted September 10, 2006 Share Posted September 10, 2006 Do you know equations of motion? Link to comment Share on other sites More sharing options...
metadigital Posted September 10, 2006 Share Posted September 10, 2006 Nearly. The car is accelerating every second by an additional 1.6m. (1.6 meters per sec per sec) So, not devided by 1.6, you need to use: where u is the initial velocity (m/s) v is the final velocity (m/s) t is the time interval (s) elapsed between the two velocity measurements (also writen as "Δt") OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT Link to comment Share on other sites More sharing options...
Surreptishus Posted September 10, 2006 Share Posted September 10, 2006 Also conevrt everthing into the same units. Convert the velocities into m/s. Link to comment Share on other sites More sharing options...
Bokishi Posted September 10, 2006 Share Posted September 10, 2006 Meta you should charge pixies for this information. Current 3DMark Link to comment Share on other sites More sharing options...
thepixiesrock Posted September 10, 2006 Author Share Posted September 10, 2006 So: 30.58m/s - 22.24m/s = 8.34 m/s, therefore; 1.6m/s^2= 8.34m/s divided by time? I'm a moron, I don't know what to do next. I can't focus. Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there. Link to comment Share on other sites More sharing options...
Nick_i_am Posted September 10, 2006 Share Posted September 10, 2006 Guys! Do my homework too! (Approved by Fio, so feel free to use it) Link to comment Share on other sites More sharing options...
thepixiesrock Posted September 11, 2006 Author Share Posted September 11, 2006 Sure, but at least I'm not just asking for the answer, I was asking how to do it. I'm trying to learn Nick. Stop pestering me. Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there. Link to comment Share on other sites More sharing options...
LostStraw Posted September 11, 2006 Share Posted September 11, 2006 According to Meta's equation, you were right the first time. a = (v - u) / t solving for t: t = (v - u) / a putting the numbers in: t = (30.6m/s - 22.2m/s) / 1.6m/s/s with rounding errors > 5.25s Link to comment Share on other sites More sharing options...
thepixiesrock Posted September 11, 2006 Author Share Posted September 11, 2006 Yeah, I know that now. Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there. Link to comment Share on other sites More sharing options...
Nick_i_am Posted September 11, 2006 Share Posted September 11, 2006 Sure, but at least I'm not just asking for the answer, I was asking how to do it. I'm trying to learn Nick. Stop pestering me. <{POST_SNAPBACK}> It was a simple request, you don't have to be rude (Approved by Fio, so feel free to use it) Link to comment Share on other sites More sharing options...
Tigranes Posted September 11, 2006 Share Posted September 11, 2006 No, we're not doing your arithmetic for you, nick. Let's Play: Icewind Dale Ironman (Complete) Let's Play: Icewind Dale II Ironman (Complete) Let's Play: Divinity II (Complete) Let's Play: Baldur's Gate Trilogy Ironman - BG1 (Complete) Let's Play: Baldur's Gate Trilogy Ironman - BG2 (In Progress) Link to comment Share on other sites More sharing options...
Colrom Posted September 11, 2006 Share Posted September 11, 2006 Meta's solution is elegant. I liked Meta's approach. He starts with the important stuff and makes a minor adjustment. He makes it easy to see that the adjustment is minor. Nice! As dark is the absence of light, so evil is the absence of good. If you would destroy evil, do good. Evil cannot be perfected. Thank God. Link to comment Share on other sites More sharing options...
Cantousent Posted September 11, 2006 Share Posted September 11, 2006 Okay, make the kid do his own work, folks! :Cant's reproachful grin icon: Fionavar's Holliday Wishes to all members of our online community: Happy Holidays Join the revelry at the Obsidian Plays channel:Obsidian Plays Remembering tarna, Phosphor, Metadigital, and Visceris. Drink mead heartily in the halls of Valhalla, my friends! Link to comment Share on other sites More sharing options...
taks Posted September 11, 2006 Share Posted September 11, 2006 i've been studying all day. a quick glance says everything is fine... nothing to see here, move along. taks comrade taks... just because. Link to comment Share on other sites More sharing options...
Arkan Posted September 11, 2006 Share Posted September 11, 2006 PHY101 stuff, really. "Of course the people don't want war. But after all, it's the leaders of the country who determine the policy, and it's always a simple matter to drag the people along whether it's a democracy, a fascist dictatorship, or a parliament, or a communist dictatorship. Voice or no voice, the people can always be brought to the bidding of the leaders. That is easy. All you have to do is tell them they are being attacked, and denounce the pacifists for lack of patriotism, and exposing the country to greater danger." - Herman Goering at the Nuremberg trials "I have also been slowly coming to the realisation that knowledge and happiness are not necessarily coincident, and quite often mutually exclusive" - meta Link to comment Share on other sites More sharing options...
taks Posted September 11, 2006 Share Posted September 11, 2006 yeah, the actual derivations for the equations (using calculus, derivatives) are college level, but high-school physics does spend a lot of time on the actual equations. my high-school physics class was a blast. the teacher was one i'll never forget... taks comrade taks... just because. Link to comment Share on other sites More sharing options...
Lucius Posted September 11, 2006 Share Posted September 11, 2006 Math is the work of the devil, someone summon Eldar! We need to banish the daemon! :ph34r: DENMARK! It appears that I have not yet found a sig to replace the one about me not being banned... interesting. Link to comment Share on other sites More sharing options...
Atreides Posted September 11, 2006 Share Posted September 11, 2006 In before someone divides by 0. Spreading beauty with my katana. Link to comment Share on other sites More sharing options...
6 Foot Invisible Rabbit Posted September 11, 2006 Share Posted September 11, 2006 Guns don't kill people. Physics kill people. Harvey Link to comment Share on other sites More sharing options...
taks Posted September 11, 2006 Share Posted September 11, 2006 dividing by zero is a legitimate function unless the dividend is also zero. taks comrade taks... just because. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now