Answers

2014-05-04T19:16:00+08:00
We need to find first the speed, vf^2 = vo^2 +2ad
vf^2 = 0^2 +2(32.1 ft/s^2)(778)
vf = 223.49 ft/s
KE = 0.5*m*v^2
KE = 0.5*(3220)*(223.49)^2
KE = 8.04 x 10^7 lbf


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