GEOLOGY

Detailed explanation-1: -Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other. Many children are aware of magnetism and have played with fridge magnets.

Detailed explanation-2: -Gravity is a non-contact force that exists between two objects even when not in contact. It is a force which acts over a distance of separation between two objects.

Detailed explanation-3: -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.

Detailed explanation-4: -Examples of this force include: electricity, magnetism, radio waves, microwaves, infrared, visible light, X-rays and gamma rays.

Detailed explanation-5: -Friction – force that resists the motion of two surfaces that are touching each other; often results in heat. Inertia – an object’s tendency to resist a change in motion. Balanced force – equal forces acting in opposite directions. Net force = 0 Result – no motion.