123. Using the same coordinate system assumed in Eq. 4-25, we find xfor the elevated cannon from yxgxvy=−=−tancosθ02002230bgwhere m.Using the quadratic formula (choosing the positive root), we find xvvvgyg=+−FHGGIKJJ22cossinθθbgwhich yields x= 715 m for v0= 82 m/s and
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