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2014-08-28T06:03:19+05:30

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acceleration at any time t is the slope of v-t graph at that point t.

acceleration = slope of graph = tan Ф
       = tan 30 deg  = 1/√3 units
     and tan 60 =  √3 units

ratio = 1/√3 / (√3) = 1/3

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