document.write( "Question 1024973: I was using an online calculator to figure kinetic energy. Known are mass and velocity (mass = 395,000 lbs and velocity is 500 mph.) The answer given is 3.3011e+9 ft. lbs., but I don't know what this means. Can someone decipher this, please? \n" ); document.write( "
Algebra.Com's Answer #640609 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Kinetic energy is given in units of energy typically watts in English units or Joules in SI units.
\n" ); document.write( "Ft-lbs are definitely not the correct unit.
\n" ); document.write( "I like SI because it's more logical so converting,
\n" ); document.write( "\"m=395000%2F2.2=179545\"\"kg\"
\n" ); document.write( "\"v=500%2A%281.6%2F1%29%2A%281000%2F1%29%2A%281%2F3600%29\"\"cross%28mi%29%2Fcross%28hr%29\"\"cross%28km%29%2Fcross%28mi%29\"\"m%2Fcross%28km%29\"\"cross%28hr%29%2Fs\"
\n" ); document.write( "\"v=222\"\"m%2Fs\"
\n" ); document.write( "So then,
\n" ); document.write( "\"KE=%281%2F2%29mv%5E2=%281%2F2%29%28179545%29%28222%29%5E2=4.43x10%5E9\"\"J\"
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\n" ); document.write( "Word of warning, don't use online calculators for simple calculations.
\n" ); document.write( "They might not yield the correct answer.
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