document.write( "Question 724225: A diver is standing on a platform 24 feet above the pool. He jumps from the platform with an initial upward velocity of 8ft/s. How long will it take for him to hit the water? I know the formula is h=-16t^2+vt+s, but I don't understand the difference between h and s. \n" ); document.write( "
Algebra.Com's Answer #443690 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
A diver is standing on a platform 24 feet above the pool.
\n" ); document.write( " He jumps from the platform with an initial upward velocity of 8ft/s.
\n" ); document.write( " How long will it take for him to hit the water?
\n" ); document.write( " I know the formula is h=-16t^2+vt+s, but I don't understand the difference between h and s.
\n" ); document.write( ":
\n" ); document.write( "The Formula h = -16t^2 + vt + s; where
\n" ); document.write( "h = height after t seconds
\n" ); document.write( "t = time in seconds
\n" ); document.write( "v = upward velocity
\n" ); document.write( "s = initial height (t=0)
\n" ); document.write( "also note that
\n" ); document.write( "-16t^2 represents the downward force of gravity for t seconds
\n" ); document.write( "+vt = the upward force for t seconds
\n" ); document.write( ":
\n" ); document.write( "the height when he hits the water = 0 therefore:
\n" ); document.write( "0 = -16t^2 + 8t + 24
\n" ); document.write( "usually written
\n" ); document.write( "-16t^2 + 8t + 24 = 0
\n" ); document.write( "we can simplify this, divide by -8, then we have
\n" ); document.write( "2t^2 - t - 3 = 0
\n" ); document.write( "this will factor to
\n" ); document.write( "(2t - 3)(t + 1) = 0
\n" ); document.write( "the positive solution
\n" ); document.write( "2t = 3
\n" ); document.write( "t = 3/2
\n" ); document.write( "t = 1.5 seconds to hit the water
\n" ); document.write( "- \n" ); document.write( "
\n" );