document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1127486>Question 1127486</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A tennis ball is thrown vertically upward with an initial velocity of +8.0cm/s.<BR>\n" );
document.write( "a.What will the balls speed be when it returns to its starting point.<BR>\n" );
document.write( "b.How long will the ball take to reach its starting point? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #744074 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=744074\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A tennis ball is thrown vertically upward with an initial velocity of +8.0cm/s.<BR>\n" );
document.write( "a.What will the balls speed be when it returns to its starting point.<BR>\n" );
document.write( "It's the same, 8 cm/sec<BR>\n" );
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document.write( "b.How long will the ball take to reach its starting point?<BR>\n" );
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document.write( "Using 10 m/sec/sec for gravity:<BR>\n" );
document.write( "h(t) = -5t^2 + 0.08t<BR>\n" );
document.write( "Start point is at h(t) = 0<BR>\n" );
document.write( "-5t^2 + 0.08t = 0<BR>\n" );
document.write( "t*(-5t + 0.08) = 0<BR>\n" );
document.write( "t = 0 -- at launch<BR>\n" );
document.write( "t = 0.08/5 = 0.016 seconds<BR>\n" );
document.write( " </SPAN>\n" );
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