However, even though the potential energy of the hammer remained constant, its kinetic energy was constantly increasing because the hammer was falling under the influence of gravity.
In a normal situation, the kinetic energy and speed of the hammer will increase as it falls, while its potential energy will decrease. This way, the total mechanical energy of the hammer will remain constant.
However, what she was doing was maintaining the potential energy of the hammer, so the total mechanical energy was increasing as she fell to the ground.
And since she was replicating her total mechanical energy as gravitational power and using this gravitational power to pull her down to the ground to increase her acceleration, as she fell, the stronger the gravitational power became, and the faster her mechanical energy increased.
