9 2 Problems of

13 / :: 71744 : 675it the Force re-quired.

CASE XV,

The greatest Randon of a Piece be-ing 8000, Quere atwhat Distance shewill strike an Object: with the greatestForce possible whole Surface reclines

Since the Surface reclines 42?, it'splain, the Direction to strike it at RightAngles, which is the Direction of thegreatest Force, is 41° • then R ; S, 142°:: 8000 : 79^6, the Distance re-quired. Hence it’s ealy to observe,that is the Surface of an Object recline45 0 , the greatest Force it can be struckwith is from the greatest Distance, andthe contrary.

AW, If the Ingeneer has Field"Room, and can vary his Positions andDistances as he pleases, he may strike

an