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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).

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