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23 Nov 2019
(A worker poling a boatâa very efficient mode oftransportationâacross a shallow lake.) He pushes parallel to thelength of the light pole, exerting a force of magnitude 235 N onthe bottom of the lake. Assume the pole lies in the vertical planecontaining the keel of the boat. At one moment, the pole makes anangle of 36.5° with the vertical and the water exerts a horizontaldrag force of 47.5 N on the boat, opposite to its forward velocityof magnitude 0.857 m/s. The mass of the boat including its cargoand the worker is 397 kg.
The water exerts a buoyant force vertically upward on the boat.Find the magnitude of this force.
(A worker poling a boatâa very efficient mode oftransportationâacross a shallow lake.) He pushes parallel to thelength of the light pole, exerting a force of magnitude 235 N onthe bottom of the lake. Assume the pole lies in the vertical planecontaining the keel of the boat. At one moment, the pole makes anangle of 36.5° with the vertical and the water exerts a horizontaldrag force of 47.5 N on the boat, opposite to its forward velocityof magnitude 0.857 m/s. The mass of the boat including its cargoand the worker is 397 kg.
The water exerts a buoyant force vertically upward on the boat.Find the magnitude of this force.
