A small lawn sprinkler is shown. The sprinkler operates at a gage pressure of (140 mathrm{kPa}). The

Question:

A small lawn sprinkler is shown. The sprinkler operates at a gage pressure of \(140 \mathrm{kPa}\). The total flow rate of water through the sprinkler is \(4 \mathrm{~L} / \mathrm{min}\). Each jet discharges at \(17 \mathrm{~m} / \mathrm{s}\) (relative to the sprinkler arm) in a direction inclined \(30^{\circ}\) above the horizontal. The sprinkler rotates about a vertical axis. Friction in the bearing causes a torque of \(0.18 \mathrm{~N} \cdot \mathrm{m}\) opposing rotation. Evaluate the torque required to hold the sprinkler stationary.

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