A pendulum is executing simple harmonic motion and its maximum kinetic energy is K₁. If the length of the pendulum is doubled and it performs simple harmonic motion with the same amplitude as in the first case, its maximum kinetic energy is K₂. Then?
A. K₂=K₁/4
B. K₂=K₁/₂
C. K₂=2K₁
D. K₂=K₁