15 : An expanding hot gas in a barrel of AK -4 #7 pushes m= 12.0 a bullet with the force F which can be approximated by formula F( x ) = A/x , where x is the distance along the barrel ( in meters ) from the barrel's beginning, and A is a constant A = 1.30 x 103 Newton meters. Assuming that the initial position of the bulllet was 80. 0mm from the barrel's beginning , find the work this force had done on the bullet as it leaves the barrel 450nm long barrel 1 = overall length of the barrel from the barrel's beginning to the barrel's end ) . W = J How mush is the kinetic energy of the bullet as it leaves the barrel? J How much is the speed of the bullet as it leaves the barrel? m /s = f7 /s = mah