A particle executes simple harmonic motion with a frequency \( f \)...

A particle executes simple harmonic motion with a frequency \( f \). The frequency with which its kinetic energy
\( \mathrm{P} \) oscillates is
[IIT-JEE 1973, 87; Manipal MEE 1995;
W
MP PET 1997; DCE 1997, 99; UPSEAT 2000;
RPET 2002; RPMT 2004; BHU 2005;
Similar Odisha JEE 2008]
(a) \( f / 2 \)
(b) \( f \)
(c) \( 2 f \)
(d) \( 4 f \)