The bob of a simple pendulum has a mass of 0.40 kg. The pendulum oscillates with a period of 2.0 s and an amplitude of 0.15 m.
At one point in its cycle it has a potential energy of 0.020 J.
What is the kinetic energy of the pendulum bob at this point?
A. 0.024 J
B. 0.044 J
C. 0.14 J
D. 0.18 J