document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=853816>Question 853816</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi I really need help with these questions please. Could someone show their solution too please. Thank you so much.\r<BR>\n" );
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document.write( "1.)A ball is thrown upward with an initial velocity 60m/sec. The speed of the ball decreases uniformly with time and after 3 secs its velocity is 30.6m/sec.\r<BR>\n" );
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document.write( "a.)Determine the equation relating the velocity of the ball and time<BR>\n" );
document.write( "b.)Draw the line given by this equation<BR>\n" );
document.write( "c.)Determine the time at which the velocity of the ball is zero<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #514259 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=514259\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.)A ball is thrown upward with an initial velocity 60m/sec. The speed of the ball decreases uniformly with time and after 3 secs its velocity is 30.6m/sec.\r<BR>\n" );
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document.write( "a.)Determine the equation relating the velocity of the ball and time<BR>\n" );
document.write( "acceleration = change in speed/time<BR>\n" );
document.write( "a = (30.6 - 60)/3<BR>\n" );
document.write( "a = - 9.8 m/sec/sec (negative since it's decreasing)<BR>\n" );
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document.write( "v = 60 + a*t<BR>\n" );
document.write( "v = 60 - 9.8t<BR>\n" );
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document.write( "b.)Draw the line given by this equation<BR>\n" );
document.write( "It's a straight line thru the 2 points (0,60) and (3,30.6)<BR>\n" );
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document.write( "c.)Determine the time at which the velocity of the ball is zero<BR>\n" );
document.write( "v = 60 + at<BR>\n" );
document.write( "v = 60 - 9.8t = 0<BR>\n" );
document.write( "t = 60/9.8<BR>\n" );
document.write( "t =~ 6.122 seconds<BR>\n" );
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