When a flywheel is plugged into an electric source, it spins up, converting electrical current into kinetic energy.
(a flywheel; is plugged; into an electric source) (it; spins up; T:When a flywheel is plugged into an electric source) (it; converting; electrical current; into kinetic energy)
a flywheel it it
is plugged spins up converting
into an electric source
T:When a flywheel is plugged into an electric source
electrical current into kinetic energy