anything that has an arm
Mechanical work.
name a device that convert the mechanical energy into electrical energy
A resonator is a device that produces resonance. They are used to generate waves of specific frequencies. Say for example the musical instruments, cavity resonator (electromagnetic), cavity magnetron, the klystron. There is what we call mechanical resonators used in electronic circuits.
what do we call the energy motion
A spinning top is a moving mass, and this represents a form of mechanical energy we call kinetic energy, which is the energy of motion.
You can call a person who loves mechanical objects a mechanic. You can even call them Machinist, inventor or even an engineer depending on what type of mechanical devices they working on.
Yes this is what we call efficiency of the motor. We give 100 but the motor in turn gives 40, so its efficiency is 40%
A motion
Mechanical devices mostly symbolize the parts, joints, rigid structures in it... they mostly symbilize the tough mechanical components therefore call as mechanical :)
The energy related to motion is called "kinetic energy".
electronic promting device
The energy of mass in motion is kinetic energy.