The diagram gives a view from above of a sprinkler system used to water a garden. The sprinkler is made from a tube of length $0.15\,\text{m}$. The tube is pivoted at its midpoint and rotates in a horizontal plane while releasing jets of water from both ends. The two water jets act in opposite directions to each other. Each water jet applies a horizontal force of $3.0\,\text{N}$ on the tube at right angles to the tube. What is the magnitude of the torque on the tube due to the water jets?
Physics 9702 · AS & A Level · Turning effects of forces