A ski tow operates on a 15.0 slope of length 300 m. The

Chapter 6, Problem 6.59

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Effect on Blood of Walking. While a person is walking, his arms swing through approximately a 45° angle in \(\frac{1}{2} s\). As a reasonable approximation, assume that the arm moves with constant speed during each swing. A typical arm is 70.0 cm long, measured from the shoulder joint. (a) What is the acceleration of a 1.0-g drop of blood in the fingertips at the bottom of the swing? (b) Draw a free-body diagram of the drop of blood in part (a). (c) Find the force that the blood vessel must exert on the drop of blood in part (a). Which way does this force point? (d) What force would the blood vessel exert if the arm were not swinging?

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