document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1167000>Question 1167000</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. The height of an object launched vertically above the surface of a planet is given by the function h=-1/2gt^2+vt+h, where g is the gravtiational acceleration on that planet, v is the initial velocity and h is the initial height of the object.<BR>\n" );
document.write( "The gravitational acceleration on Mars is 4m/s^2. An astronaut jumps from a 10 metre high rock into the air with velocity of 8m/s upwards. He reaches a max height then accelerates downwards and eventually lands safely on the ground beneath the rock.<BR>\n" );
document.write( "a)What is the max height reached by the astronaut<BR>\n" );
document.write( "b)When is that max height achieved?<BR>\n" );
document.write( "c)What is the duration of his flight?<BR>\n" );
document.write( "d)When is the astronaut at the same height as the rock on his way down?<BR>\n" );
document.write( "e)For how long is the astronaut higher than 12 metres above the ground? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #791579 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52781)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=791579\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "If you want to learn the subject to that level to solve such problems on your own and to learn it from a good source, <BR>\n" );
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document.write( "In this site, I prepared the lessons that cover the entire subject\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/word/travel/Problem-on-a-projectile-moving-vertically.lesson>Problem on a projectile moving vertically up and down</A>\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/word/travel/Problem-on-projectile-shooted-vertically-upward.lesson>Problem on an arrow shot vertically upward</A>\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/word/travel/Typical-problems-on-an-projectile-moving-vertically-up-and-down.lesson>Problem on a ball thrown vertically up from the top of a tower</A> \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/word/travel/Problem-on-a-toy-rocket-launched-vertically-up--from-the-top-of-a-platform.lesson>Problem on a toy rocket launched vertically up from a tall platform</A>\r<BR>\n" );
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document.write( "Consider these lessons as your textbook, &nbsp;handbook, &nbsp;tutorials and &nbsp;(free of charge) &nbsp;home teacher.<BR>\n" );
document.write( "Read them attentively and learn how to solve this type of problems once and for all.\r<BR>\n" );
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document.write( "Also, &nbsp;you have this free of charge online textbook in ALGEBRA-I in this site\r<BR>\n" );
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document.write( "The referred lessons are the part of this textbook under the topic \"<U>Projectiles launched/thrown and moving vertically up and dawn</U>\".\r<BR>\n" );
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document.write( "Save the link to this online textbook together with its description\r<BR>\n" );
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document.write( "Free of charge online textbook in ALGEBRA-I<BR>\n" );
document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r<BR>\n" );
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document.write( "to your archive and use it when it is needed.\r<BR>\n" );
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document.write( "DO NOT MISS YOUR CHANCE (!)\r<BR>\n" );
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document.write( "It is really a UNIQUE CHANCE (!)\r<BR>\n" );
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document.write( " </SPAN>\n" );
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