document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=76190>Question 76190</A>: <I><SPAN STYLE=\"word-break: break-all;\"> During a chemistry experiment, the cork in a .5 foot tall beaker with an effervescent solution pops off with an ititial velocity of 20 feet per second.  How many second does it take for the cork to hit the table?  \r<BR>\n" );
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document.write( "I need help in how to work out the problem.  I believe I use the equation: y=Ax^2 + Bx + C.\r<BR>\n" );
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document.write( "Mitch </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #54702 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=54702\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the position (s) of an object moving under constant acceleration (a) with initial velocity (v) and initial position (p) in time (t) is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s=%28at%5E2%29%2F2%2Bvt%2Bp ALIGN=MIDDLE  ALT=\"s=%28at%5E2%29%2F2%2Bvt%2Bp\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "using 32ft/sec/sec as the gravitational acceleration <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s=-16t%5E2%2B20t%2B.5 ALIGN=MIDDLE  ALT=\"s=-16t%5E2%2B20t%2B.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >...the first term is negative because gravity acts downward\r<BR>\n" );
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document.write( "setting s=0 (cork on table) and solving for t gives...<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=%28-20+%2B-+sqrt%2820%5E2-4%2A%28-16%29%2A.5%29%29%2F%282%2A%28-16%29%29 ALIGN=MIDDLE  ALT=\"t=%28-20+%2B-+sqrt%2820%5E2-4%2A%28-16%29%2A.5%29%29%2F%282%2A%28-16%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >...or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=%28-20+%2B-+sqrt%28432%29%29%2F%28-32%29 ALIGN=MIDDLE  ALT=\"t=%28-20+%2B-+sqrt%28432%29%29%2F%28-32%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >...or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=.625+%2B-+.375+%28sqrt%283%29%29 ALIGN=MIDDLE  ALT=\"t=.625+%2B-+.375+%28sqrt%283%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so t approximately equals 1.27 sec. \r<BR>\n" );
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