think about a girl on a swing. when is the kinetic energy of the girl zero?
question 5 options:
at the bottom of the swing
when the girl is swinging backward
it is never zero
when she stops moving at the top of the swing

At the top of the swing is your answer.

Kinetic energy increases as an object falls. Increase of speed also increases kinetic energy. The kinetic energy is at zero when an object is not moving

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.