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You are walking by a river flowing at 1.67 m/s and decide to step into it to cool off.
(a) Estimate the force exerted on you as a function of the depth of the river.
(b) What is the force on you if you lie in a swimming position, but remain stationary?
(c) How does the force vary with the speed of the river?
Hints: Treat your body as a cylinder, and take the density of the water to be 1000 kg/m³.

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