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B Acceleration vs time graph

  1. Jun 5, 2017 #1
    is the velocity at t=0 in acceleration vs time graph must be 0 .please answer my question
    o1kYLaayNTcEgzjvadqFxo8re92eliZoCwmUE5D0QU3lraq0myEa90Yqu095kN1H06RhiNlcIN9DqxFBwwnCWMKy.png
     
  2. jcsd
  3. Jun 5, 2017 #2
    Not necessarily.
     
  4. Jun 5, 2017 #3
    but why the velocity = a*t so v=4*0=o m/s
     
  5. Jun 5, 2017 #4
    $$v=v_0+at$$
     
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