Help me plzzz An object is on the roof of the school at a height of 20 m. It has a potential energy of 15000 J. What is the object's mass?​

    5.5 n======    assuming that      we have      m = 0.145 kg    a = 38 m/s²therefore    5.51 n, but two significant figures.final answer: 5.5 n

Ibelieve the answer is d. macula  hope my answer has you : )

Answer mechanical energy;

The best answer i can think of is b