If you mean the SI Unit of GPE, the answer is J for Joules.
if that's not the question being asked, i would need a little more elaboration please :)
When an object is acted on by an unbalanced force, then that object will accelerate.
Answer:
D lower energy waves is most likely the safest if one is exposed to.
The velocity of the mass after 9 second is 88 m/s