A mass of \( 1 \mathrm{~kg} \) is executing SHM which is given by \( x=6.0 \cos \left(100 t+\fra...

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A mass of \( 1 \mathrm{~kg} \) is executing SHM which is given by \( x=6.0 \cos \left(100 t+\frac{\pi}{4}\right) \mathrm{cm} \). What is the maximum kinetic energy?
(a) \( 3 \mathrm{~J} \)
(b) \( 6 \mathrm{~J} \)
(c) \( 9 \mathrm{~J} \)
(d) \( 18 \mathrm{~J} \)
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