GEOLOGY

Detailed explanation-1: -Answer and Explanation: Both magnetism and gravity are considered forces at a distance. These are forces that are not in direct contact with the object upon which they act. Since magnetism cannot be present without electricity, electricity is also non-contact force.

Detailed explanation-2: -Magnetism is an example of a non-contact or action-at-a-distance force. These are forces which can act on an object without being in physical contact with it. The force of gravity is another example. Thus, gravity will pull a raindrop down to Earth without any tangible physical link between the Earth and the drop.

Detailed explanation-3: -Both gravitational and the magnetic forces are known as conservative forces. This property relates to work being path independent. That is, it takes the same amount of work to move a mass, in some external gravitational field, from one point to another regardless of the path taken between the two points.

Detailed explanation-4: -The gravitational force and magnetic force are different in nature, as an example shows. Imagine two magnets: the magnetic force between them will and two attracting and repelling (depending on the orientations), whilst the gravity force between them will always be attractive.

Detailed explanation-5: -Gravitational force is an example of a non-contact force.