A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to 8 10 -4 J by the end of the second revolution after the beginning of the motion ?

1. A. 0.1 m/s 2
2. B. 0.15 m/s 2
3. C. 0.18 m/s 2
4. D. 0.2 m/s 2

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