kinetic energy
The term 'energía cinética' in Spanish translates to 'kinetic energy' in English. Kinetic energy is the energy that an object possesses due to its motion. It is defined as the work needed to accelerate an object of a certain mass from rest to its stated velocity. Having gained this speed, the object maintains its kinetic energy unless its speed changes. The kinetic energy can be transferred between objects and transformed into other kinds of energy.
The kinetic energy is transferred from the steel ball to the rubber one
This sentence is explaining that kinetic energy (the energy of an object in motion) can be transferred from one object to another, in this case from a steel ball to a rubber ball. Kinetic energy is often transferred in physical interactions.
A body's kinetic energy is related to its mass and speed
This sentence is explaining a fundamental principle of physics that a body's kinetic energy (the energy an object possesses due to its motion) is determined by its mass and velocity. Specifically, the kinetic energy increases if either the mass or the velocity of the body increases.
When an object moves, it acquires kinetic energy
This sentence touches upon the basic concept from Physics that when an object is in motion, it has kinetic energy. The energy here is due to movement or motion.