Final answer:
The ball can get the necessary energy for movement from the force of gravity, which converts gravitational potential energy into kinetic energy, or from an external power source such as a person throwing or kicking the ball. Additionally, energy can be lost due to deformation, work done against the floor, and friction.
Step-by-step explanation:
The question regarding where the ball gets the energy it needs to move touches upon basic principles of physics and energy transfer. When a ball moves, it can gain energy from several external and internal sources. In the context provided, if a ball starts moving without any applied external power like a push or a pull, the energy can come from the force of gravity which converts gravitational potential energy into kinetic energy as the ball falls. If the ball deformed upon hitting the ground, energy was required to alter its shape; this is part of the conversion of kinetic energy to deformation and then back to kinetic energy when the ball rebounds. During this process, some energy is lost due to the work done pushing on the floor and because of friction between the ball and the floor.
If we're considering a scenario such as a thrown or kicked ball, an external power source, usually in the form of muscle energy from a person, initiates the motion. Once in motion, while the ball falls towards the earth, the work done on it by gravity becomes positive, accelerating the ball and increasing its kinetic energy as potential energy is converted. Conversely, as the ball rises after being thrown or kicked, the work done by gravity slows the ball down, converting kinetic energy back into potential energy.
Importantly, any real-world motion will involve some energy loss due to friction, air resistance, and other forms of dissipation, which must be accounted for to accurately calculate the ball's energy throughout its motion.