"Driving a motor........"chemical energy is converted into kinetic energy.
"Falling off of cliff".........gravitational potential energy is converted into kinetic energy.
"Hydroelectric energy generation".......gravitational potential energy is converted into kinetic energy (i.e. driving a generator), which is then converted into electrical energy.
"Nuclear power generation".........mass is converted into energy, which then drives a steam turbine, which is then converted into electrical energy.