Question: A 4 - ft wide semicircular gate AB is used to release water from a channel by rotation about a hinge at B . For

A 4-ft wide semicircular gate AB is used to release water from a channel by rotation about a hinge at B. For r =3.5 ft, find (a) the resultant water pressure force on the gate and (b) the vertical and horizontal reactions at B. Assume that the weight of the gate can be neglegted and that the support at A is smooth.

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