• christian nwanze projectiles
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    A ball is thrown vertically upwards with a velocity of 30m/s. Calculate the time taken for it to return to the ground     27 May 2012Comment
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    • andy chuks Using v=u+at,
      v = 30m/s
      u = -30m/s
      a = 10m/s

      30=-30+10t
      t=6s
      Like It2 Unlike It0 04 June 2012
    • nwabuisi chidubem Using eq 4 total time of flight, 2u/g. Where u=30ms^-1& g=10ms^-2 there4 total time of flight= 2*30/10
      = 60/10= 6sec. There4 total time of flight is 6sec then the time taken to hit the ground 4rm max.height is 6/3=3sec.
      Like It0 Unlike It2 06 April