Question 1163910
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If forget/neglect the air resistance and consider the events in vacuum,
   where only gravitation does matter, then


    (a)  v = {{{v[0]}}} - g*t = 14 - 10*1 = 4 m/s

                              (here g is the free fall acceleration 9.81 m/s ~ 10 m/s).



    (b)  t = {{{v[0]/g}}} = {{{14/10}}} = 1.4 seconds.
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Solved.