document.write( "Question 1144384: You ride your bike for 1.5 h at an average velocity of 10 km/h, then for 30 min at 13 km/h. What is your average velocity? \n" ); document.write( "

Algebra.Com's Answer #765480 by ikleyn(52794) $\"\"$ $\"About$

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document.write( "First part of the ride is 1.5*10 = 15 kilometers.\r\n" );
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document.write( "Second part of the ride is 0.5*13 = 6.5 kilometers.\r\n" );
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document.write( "The entire distance is  15 + 6.5 = 21.5 kilometers.\r\n" );
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document.write( "The total time is 1.5 + 0.5 = 2 hours.\r\n" );
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document.write( "The average rate (or speed) is    =  kilometers per hour.\r\n" );
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document.write( "This answer is correct, if the path is rectilinear.\r\n" );
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document.write( "Then the speed and the velocity are almost synonymous.\r\n" );
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document.write( "But if the path is curvilinear,  then the given data IS NOT ENOUGH to answer the question.\r\n" );
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\n" ); document.write( "\n" ); document.write( "You should know the difference between the rate (= the speed) and velocity.\r
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\n" ); document.write( "\n" ); document.write( "The first one is a number, while the second one is a vector.\r
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