document.write( "Question 350212: A car travels at 60 mph east for 20 min then at 30 mph east for 30 minutes. What is the average speed and average velocity? \n" ); document.write( "

Algebra.Com's Answer #250322 by Fombitz(32388) $\"\"$ $\"About$

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Rate*Time=Distance
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\n" ); document.write( " $\"D%5B1%5D=60%281%2F3%29=20\"$ miles
\n" ); document.write( " $\"D%5B2%5D=30%281%2F2%29=15\"$ miles
\n" ); document.write( "Total distance traveled= $\"20%2B15=35\"$ miles
\n" ); document.write( "Total time traveling= $\"5%2F6\"$ hr
\n" ); document.write( "Average speed: $\"S=35%2F%285%2F6%29=42\"$ mph
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\n" ); document.write( "Let positive x be East.
\n" ); document.write( "Let positive y be North.
\n" ); document.write( "Starting position:( $\"0\"$ , $\"0\"$ )
\n" ); document.write( "East displacement:( $\"20\"$ , $\"0\"$ )+( $\"15\"$ , $\"0\"$ )
\n" ); document.write( "Final position:( $\"0\"$ , $\"0\"$ )+( $\"35\"$ , $\"0\"$ )=( $\"35\"$ , $\"0\"$ )
\n" ); document.write( "Time: $\"5%2F6\"$ hr
\n" ); document.write( " $\"V=X%2Ft\"$
\n" ); document.write( "Average velocity: $\"V\"$ =( $\"42\"$ , $\"0\"$ )\r
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