document.write( "Question 1127487: An apple falls from a tree and hits the ground in 2 seconds.How fast was it going right before it hit? \n" ); document.write( "

Algebra.Com's Answer #743900 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "            Such problem may come from Physics or from Calculus.\r
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\n" ); document.write( "\n" ); document.write( "            But I do not think that it came from Algebra.\r
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\n" ); document.write( "\n" ); document.write( "            Notice to the person who posted it: it would be good (benefited) for you
\n" ); document.write( "            to point where this problem came from and what kind of the solution do you expect (do you want) to get\r
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\n" ); document.write( "\n" ); document.write( "                    - if you do understand the meaning of my words.\r
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\n" ); document.write( "\n" ); document.write( "Physics solution\r
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document.write( "If it is a free fall, then  the speed as the function of time is\r\n" );
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document.write( "    V(t) = g*t,\r\n" );
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document.write( "where \"g\" is the free fall acceleration, g = 9.81 m/s^2 = 32 ft/s^2.\r\n" );
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document.write( "Therefore,  after 2 seconds of the free fall the speed of a falling object is\r\n" );
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document.write( "    V = 9.81*2 = 19.62 m/s.\r\n" );
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\n" ); document.write( "\n" ); document.write( "You can calculate it in ft/s on your own, if you want / (if you need).\r
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document.write( "By the way, assuming free fall, the height of the fall is \r\n" );
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document.write( "    H =  =  = 20 meters,\r\n" );
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document.write( "which is not very realistic for an apple tree.\r\n" );
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document.write( "    20 meters is the height of an 5 - 7 floors living building.\r\n" );
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