A wrecking ball hanging motionless at the top of its swing holds:

1. Potential energy is the energy of position, kinetic energy the energy of motion. 2. A ball that is not moving has no motion to account for. 3. As the wrecking ball hangs motionless, it has 0 kinetic and 100 percent potential energy. 4. Somewhere mid-fall it has 50 percent kinetic and 50 percent potential energy, which is the trap option here. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 6 'Metabolism', sections 6.1-6.5_