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A particle of mass \( 10 \mathrm{~g} \) moves along a circle of radius \( 6.4 \mathrm{~cm} \) with a constant tangential acceleration. What is the magnitude of this acceleration, if the kinetic energy of the particle becomes equal to \( 8 \times 10^{-4} \mathrm{~J} \) by the end of the second revolution after the beginning of the motion?
(a) \( 0.15 \mathrm{~ms}^{-2} \)
(b) \( 0.18 \mathrm{~ms}^{-2} \)
(c) \( 0.2 \mathrm{~ms}^{-2} \)
(d) \( 0.1 \mathrm{~ms}^{-2} \)
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