Answer:
3072J
Explanation:
At all points through her slide, it is important to reiterate that energy is always conserved.
Kinetic energy is the energy due to the motion of a body.
Potential energy is the energy due to the position of a body.
Based on the law of conservation of energy, energy is neither created nor destroyed but simply transformed from one form to another.
 So;
At all points:
      Total energy  = Potential energy + Kinetic energy
Since the initial energy  = 5000J which is the potential energy
This is the total energy within the system as the kinetic energy at this point is 0;
 After a few seconds, the potential energy is 1928J;
 Kinetic energy  = Total energy  - potential energy  = 5000J  - 1928J
 Kinetic energy  = 3072J
