A 12-g CD with a radius of 6.0 cm rotates with an angular speed of 34 rad/s.
(a) What is its kinetic energy?
(b) If its kinetic energy is to be quadrupled, should its angular speed be doubled, quadrupled, or increased by a factor of 16?
(c) Calculate the angular speed required to quadruple the kinetic energy the CD had in part (a). |
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