document.write( "Question 287363: On the moon, the acceleration due to gravity is -1.6 meters per second per second. A stone is dropped from a cliff on the moon and hits the surface of the moon 20 seconds later. \r
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\n" ); document.write( "\n" ); document.write( "b)What was its velocity at impact?
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Algebra.Com's Answer #208269 by Alan3354(69443)\"\" \"About 
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On the moon, the acceleration due to gravity is -1.6 meters per second per second. A stone is dropped from a cliff on the moon and hits the surface of the moon 20 seconds later.
\n" ); document.write( "a)How far did it fall?
\n" ); document.write( "s = (1/2)at^2
\n" ); document.write( "s = 1.6*400/2
\n" ); document.write( "s = 320 meters
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\n" ); document.write( "b)What was its velocity at impact?
\n" ); document.write( "v = at
\n" ); document.write( "v = 1.6*20 = 32 meters/sec
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