A 10-Kg Mass Oscillates Along the X Axis with Simple Harmonic

Multiple Choice

A 1.0-kg mass oscillates along the x axis with simple harmonic motion.Its position as a function of time is given by where the units are SI.When t = 2 s,the kinetic energy of the mass is

A) $\pi$ ²/24 J
B) $\pi$ ²/72 J
C) 2 $\pi$ ²/9 J
D) 4 $\pi$ ²/9 J
E) $\pi$ ²/4 J