document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=768133>Question 768133</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please can you answer this question\r<BR>\n" );
document.write( "\n" );
document.write( "A bus travels uniformly from 54 km/h to 72 km/h in 10 seconds. Find the <BR>\n" );
document.write( "(a)acceleration in m/s^2<BR>\n" );
document.write( "(b)distance travelled by the bus\r<BR>\n" );
document.write( "\n" );
document.write( "ANSWER<BR>\n" );
document.write( "I did the first one. Please tell me is it correct and can you tell me the second one.\r<BR>\n" );
document.write( "\n" );
document.write( "Initial velocity, u = 72 km/h = 72×(5/18) m/s = 20 m/s <BR>\n" );
document.write( "Final velocity, v = 54 km/h = 54×(5/18) m/s = 15 m/s <BR>\n" );
document.write( "Time in which velocity changes is, t = 10 s <BR>\n" );
document.write( "Acceleration, a = (v - u)/t <BR>\n" );
document.write( "=> a = (15 - 20)/10 = -0.5 m/s^2 \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #468098 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=468098\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A bus travels uniformly from 54 km/h to 72 km/h in 10 seconds. Find the <BR>\n" );
document.write( "(a)acceleration in m/s^2<BR>\n" );
document.write( "(b)distance travelled by the bus <BR>\n" );
document.write( "ANSWER<BR>\n" );
document.write( "I did the first one. Please tell me is it correct and can you tell me the second one. <BR>\n" );
document.write( "Initial velocity, u = 72 km/h = 72×(5/18) m/s = 20 m/s <BR>\n" );
document.write( "Final velocity, v = 54 km/h = 54×(5/18) m/s = 15 m/s <BR>\n" );
document.write( "Time in which velocity changes is, t = 10 s <BR>\n" );
document.write( "Acceleration, a = (v - u)/t <BR>\n" );
document.write( "=> a = (15 - 20)/10 = -0.5 m/s^2 <BR>\n" );
document.write( "--------<BR>\n" );
document.write( "Looks right, except you swapped the initial and final speeds.<BR>\n" );
document.write( "--> + 0.5 m/sec/sec<BR>\n" );
document.write( "==============================<BR>\n" );
document.write( "(b)distance travelled by the bus <BR>\n" );
document.write( "---<BR>\n" );
document.write( "Its avg speed over the 10 sec is (15 + 20)/2 = 17.5 m/sec<BR>\n" );
document.write( "17.5*10 = 175 meters\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );