Step-by-step explanation:
The total mechanical energy (E) of an object is the sum of its kinetic energy (K) and potential energy (U):
E = K + U
In this case, the object has a mechanical energy of 4000 J and a potential energy of 4000 J, so we can write:
4000 J = K + 4000 J
Solving for K, we get:
K = 4000 J - 4000 J = 0 J
Therefore, the kinetic energy of the object is 0 J. All of the mechanical energy is in the form of potential energy. This means that the object is either at rest or moving with a velocity of 0 m/s, and all of its energy is stored in its position or configuration.