In an ultracentrifuge, a 21.6-cm-long rotor is suspended magnetically in a vacuu

Question

In an ultracentrifuge, a 21.6-cm-long rotor is suspended magnetically in a vacuum. Since there is no mechanical connection to the rotor, the only friction is the air resistance due to the few air molecules in the vacuum. If the rotor is spinning with an angular speed of 3.71 x 105 rad/s and the driving forc turned off, its spinning slows down at an angular rate of 0.376 rad/s2 Part 1 (a) For a point at the end of the rotor, find the initial speed. Give answer in scientific notation. V8.03 x 10 4mls Part 2 out of 3 (b) For a point at the end of the rotor, find the tangential acceleration component. ar E mis

Explanation / Answer

(A) v = w r

v = (3.71 x 10^5 rad/s)(0.216 m) = 8.01 x 10^4 m/s

(B)a_t = alpha r = (0.376 rad/s^2) (0.216 m)

= 8.12 x 10^2 m/s^2

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