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While a person is walking, his arms swing through approximately a 45.0 degree angle in 0.530 s. As a reasonable approximation, we can 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 0.500 gram drop of blood in the fingertips at the bottom of the swing?
(b) Find the force that the blood vessel must exert on the blood in part (a).
(c) What force would the blood vessel exert if the arm were not swinging?
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