<span> When an object moves, it possesses kinetic energy. There are five types of kinetic energy - radiant, thermal, sound, </span>electrical<span> (</span>light) and mechanical<span> (motion). I would say that the three forms of kinetic energy a polyatomic molecule have are thermal, electrical and mechanical energy. Hope this answers the question. Have a nice day.</span>
I may be wrong but if mass is decreased then acceleration increases, and if velocity increases then acceleration increases so my logic is that if mass decreases then velocity increases.
