document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178129>Question 1178129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a person throws a ball upward into the air with an initial velocity of 15.0 m/s.<BR>\n" );
document.write( "a) calculate how high it goes<BR>\n" );
document.write( "b)calculate how long the ball is in the air before it comes back to his hand.<BR>\n" );
document.write( "c) how much time it takes for the ball to reach the maximum height?<BR>\n" );
document.write( "d) find the velocity of the ball when it returns to the thrower's hand    </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #807296 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=807296\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Here acceleration (a) is g = 9.8m/s^2 (this will be negative since it is going in the opposite direction of the initial velocity),\r<BR>\n" );
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document.write( "initial velocity(u)  = 15m/s<BR>\n" );
document.write( "final velocity (v) = 0m/s if the ball stops<BR>\n" );
document.write( "v^2 = u^2 + 2a*h, where h is the max height of the ball,<BR>\n" );
document.write( " we can find h by solving: h = (v^2 - u^2)/2a,<BR>\n" );
document.write( " we plug in  h = (0^2 - 15^2)/2(-9.8) = 11.48 m.\r<BR>\n" );
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document.write( "b)calculate how long the ball is in the air before it comes back to his hand.\r<BR>\n" );
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document.write( " time to reach its peak and back down to our hand.<BR>\n" );
document.write( " Using this, the time it takes to get to the top * 2 = total time of flight . Using d = (v + u)*t / 2, ) = 2(11.48)/(15) = 1.53 s to reach top,\r<BR>\n" );
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document.write( "we get a total of2*1.53 = 3.06 s to go up and back down to our hand.<BR>\n" );
document.write( " </SPAN>\n" );
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