Answers

2016-03-05T21:31:25+05:30
While walking in sand we have to resist against more frictional force applied by the sand.But while walking on concrete areas we can walk more faster because concrete floors apply less frictional force on our feet.
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2016-03-05T21:32:32+05:30
 assume you're referring to fast-pitch softball, because slow-pitch softball is a game anyone can play.
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