What is the definition of mechanical energy?

Mechanical energy is defined as the sum of potential energy and kinetic energy in a system. It refers to the energy associated with the motion and position of an object. In this context, it encompasses the energy carried by large bodies or objects that can do work due to their movement or position in a gravitational field.

This understanding highlights that mechanical energy can be observed in various applications, such as machinery, vehicles, and even the simple act of lifting an object. Potential energy relates to the height and mass of the object (gravitational potential energy), while kinetic energy is linked to the object's velocity. Therefore, energy associated with large bodies or objects indeed aligns with the definition of mechanical energy, making it the correct choice.

The other options describe forms of energy that do not correspond to the broader definition of mechanical energy. Chemical energy pertains to reactions and the bonds within molecules, electrical energy is related to electron movement, and energy transferred through radiation involves electromagnetic waves rather than the motion or position of objects.