A 12-cm diameter horizontal water jet with a speed of V_j= 25 m/s relative to the ground is deflected by a 40° cone moving to the left at V_c= 10 m/s. Determine the external force, F, needed to maintain the motion of the cone. Disregard the gravity and surface shear effects and assume the cross-sectional area of water jet normal to the direction of motion remains constant throughout the flow.

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10= 40° V= 10 m/s Water jet, V, -F