document.write( "Question 1015303: after striking the floor a certain ball rebounds 4/5 th of its height from which it has fallen.find total distance that it travel before coming to rest,if it is dropped from a height of 120 m \n" ); document.write( "
Algebra.Com's Answer #632614 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! This is an infinite sum...actually two sums...the down distances and the up distances...we find those sums by \n" ); document.write( "S = a / (1-r) \n" ); document.write( "For the down distances, \n" ); document.write( "S(downs) = 120 / (1 - 4/5) = 600 m \n" ); document.write( "For the bounces upward, \n" ); document.write( "S(ups) = (4/5)(120) / (1 - 4/5) = 480 m \n" ); document.write( "Total = 1080 m \n" ); document.write( " |