A rifle bullet is shot vertically into the air at an initial speed of 950 m/s. Assume g=-10m/s^2

Question

Find please the:

 

a.  Height reached by the bullet 

b.  Total time of the bullet is in the air, assuming the bullet was fired from ground level 

Answer 1

V=U - gt

Final velocity =0

Initial velocity = 950mt/sec

g=10mt/sec^2

0=950-10t

t = 95 sec

H= Ut -(1/2)gt^2

   =950*95-(1/2)*10*(95^2)

 

  = 95(950-475)

   =95*475

    =45125 mt

     =45.125 km

Time of bullet in air = 2*95

                             =190 sec

                             =3 min 10 sec