Answers edited by qin

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• Question #14d5b
  
• The position of an object moving along a line is given by #p(t) = cos(t- pi /3) +2 #. What is the speed of the object at #t = (2pi) /4 #?
  
• Question #cb24f
  
• Question #f7804
  
• Question #f8d33
  
• Question #6287f
  
• Why is tension added?
  
• Question #849c2
  
• Question #79da4