Homework help - XP Math - Forums
Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment

 XP Math - Forums Homework help
 User Name Remember Me? Password
 Register Arcade Members List Mark Forums Read

 Thread Tools Display Modes
 08-04-2007 #1 FEELIP Guest   Posts: n/a College Algebra Homework help -------------------------------------------------------------------------------- I dropped a ball from 3ft,6ft, and 12ft. For each of those positions i have to use the position function to calculate the times. My original times were .56,.61,.87. The books position function is s(t)=-16t(squared)+initial velocity(in ft)+original height. I also have to verify this algebraically. Can someone please help me? Last edited by FEELIP; 08-04-2007 at 11:08 AM..
 08-04-2007 #2 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 I don't understand the problem. $s(t)=-16{t^2}+Initial Velocity+Initial Height$ What time are you calculating for? the time it takes to hit the ground? __________________ Do Math and you can do Anything! Last edited by Mr. Hui; 08-04-2007 at 01:44 PM..
 08-04-2007 #3 FEELIP Guest   Posts: n/a neither do i..lol ... that is the formula my book has " the position function for a free falling object near earth's surface" unless there is a different position function that i am supposed to be using
08-04-2007   #4
FEELIP
Guest

Posts: n/a

Quote:
 Originally Posted by Mr. Hui I don't understand the problem. $s(t)=-16{t^2}+Initial Velocity+Initial Height$ What time are you calculating for? the time it takes to hit the ground?
yes the time it take to hit the ground

 08-04-2007 #5 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 When you drop a book at 12 feet, the initial velocity is 0. So the position function is: $s(t)=-16{t^2}+12=0$ $16{t^2}=12$ $t^2=0.75$ $t=\sqrt[2]0.75$ $t\approx0.87$ Conclusion: Your answer is correct. __________________ Do Math and you can do Anything!
 08-06-2007 #6 FEELIP Guest   Posts: n/a Thank, now I see what I was doing wrong. Thank you so much.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Welcome     XP Math News     Off-Topic Discussion Mathematics     XP Math Games Worksheets     Homework Help     Problems Library     Math Challenges

All times are GMT -4. The time now is 05:28 AM.

 Contact Us - XP Math - Forums - Archive - Privacy Statement - Top

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XP Math