Circular motion with tangential acceleration

2016 1 question

1. 1 Motion in a Plane
   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 $8 \times 10^{-4}$ J by the end of the second revolution after the beginning of the motion?
   A 0.15 m/$s^2$ B 0.18 m/$s^2$ C 0.2 m/$s^2$ D 0.1 m/$s^2$
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