Questions asked by Saif Rabbani

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• Two identical balls are in contact on a table . A third identical ball strike them symmeritically and come to rest after impact . The coefficient of restitution is? Thanks
  
• Block of mass m has ini. velo. u having drxn +x axis.the blk stops after covering dist. S causing similar ext. in the spring of spring const. K holding. if #mu# is the k.friction btwn the blck and surface on which it was moving,the distance S is given by?