A 1.6 kg colt automatic pistol fires a 15 g bullet into a 2.5 kg wooden block suspended from the ceiling as a ballistic pendulum. The bullet becomes imbedded in the block 6.9 10-4 s after first contact. The bullet and block swing east and rise to a height of 9.8 cm above the rest position. Based on the information in the above narrative, if the pistol was held firmly, what impulse would the recoil give to the shooter?