document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1165779>Question 1165779</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a football is kicked (in a vacuum) with an initial velocity of 7m/s at an angle of 35 degrees from the ground. How much time will the ball spend in flight?\r<BR>\n" );
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document.write( "could u show me the approach, am i supposed to multiply the velocity by sin of 35 bc i couldnt get the right answer!! could yall show me. thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #790582 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=790582\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a football is kicked (in a vacuum) with an initial velocity of 7m/s at an angle of 35 degrees from the ground. How much time will the ball spend in flight?<BR>\n" );
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document.write( "The vertical component of the speed is 7*sin(35)<BR>\n" );
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document.write( "Using h(t) = -4.9t^2 + v0*t = -4.9t^2 + 7*sin(35)t meters<BR>\n" );
document.write( "It's a parabola, and the max height is the vertex, at t = -b/2a<BR>\n" );
document.write( "t = 7*sin(35)/9.8 = sin(35)/1.4 seconds<BR>\n" );
document.write( "The time descending = time ascending<BR>\n" );
document.write( "Total flight time = sin(35)/0.7 =~ 0.8194 seconds<BR>\n" );
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