Unformatted text preview: (b) Express the magnitude of the drag force D that would be exerted on you by the flowing water as a function of its speed v . Assume that the water density is 3 w kg/m 1000 , and that your legs can be modeled as cylinders which have a drag coefficient 2 . 1 C . (Hint: What is the effective area A of your legs? You may need to make some estimates here.) (c) What force would be exerted on you if the water flowed at 10 m/s (about 22 mi/h)? (d) What is the maximum value of the magnitude of the frictional force, max s, f , between your boots and the rocks? (Use your own mass.) (e) What is the maximum drag force magnitude max D that you can experience and not lose your grip on the rocks on the bottom of the stream? To what water speed v does this correspond?...
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 '07
 LIEPE, M
 Physics, Force, Friction, FBD, swiftly moving stream, drag force magnitude

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