Object a has 604 j of kinetic energy and 285 j of gravitational potential energy. object b has 481 j of kinetic energy and 300 j of gravitational potential energy. which object has more mechanical energy? object a has more mechanical energy. object b has more mechanical energy. they have the same amount of mechanical energy. there is not enough information to know.

Mechanical energy can be defined as the sum of kinetic energy and the gravitational potential energy. 

Object A has kinetic energy as 604 J and gravitational potential energy as 285 J.
Hence, mechanical energy of A = 604 J + 285 J
                                                   = 889 J

Object B has kinetic energy as 481 J and gravitational potential energy as 300 J.
Hence, mechanical energy of A = 481 J + 300 J
                                                   = 781J

Hence, object A has more mechanical energy than B.

Sorry i think the answer is b