Cannon

Problem by zainul abidin
30 Nov 1999 00:00 WIB
A cannon fires from under the shelter inclined at an angle $\alpha$ to the horizontal. The cannon is at point $A$ at a distance $l$ from the base of the shelter (point $B$). The initial velocity of the shell is $v_0$ and its trajectory lies in the plane of the figure. Determine the maximum range $L_{max}$ of the shell.