Non-Contact Forces and its Types (Part -1) Video Lecture | Science Class 8

Non-contact forces are forces that act on an object without physically coming into contact with it. These forces can influence the motion or behavior of an object from a distance. Examples of non-contact forces include gravitational force, magnetic force, and electrostatic force.

There are several types of non-contact forces. Some common types include: 1. Gravitational force: This force is responsible for the attraction between two objects with mass. It is what keeps us grounded on Earth and governs the motion of planets and other celestial bodies. 2. Magnetic force: This force is exerted by magnets or magnetic fields. It can attract or repel certain materials based on their magnetic properties. 3. Electrostatic force: This force exists between charged particles. Like charges repel each other, while opposite charges attract each other. 4. Nuclear force: This force is responsible for holding the nucleus of an atom together. It is a strong force that acts only at very short distances. 5. Frictional force: Although it is a contact force, it can also be considered a non-contact force in certain situations. Friction opposes the motion of objects and is caused by the interaction between their surfaces.

Gravitational force is a non-contact force that attracts objects with mass towards each other. It is always attractive and acts over any distance. The magnitude of the gravitational force between two objects depends on their masses and the distance between them. The larger the masses, the stronger the force, and the closer the objects are, the stronger the force. This force is what keeps us grounded on Earth and governs the motion of planets, moons, and other celestial bodies in the universe.

No, non-contact forces cannot be seen as they do not involve direct physical contact. These forces are only observed through their effects on objects. For example, we cannot see the gravitational force between two objects, but we can observe its effects when objects fall towards the Earth or when planets orbit around the sun. Similarly, we cannot see magnetic or electrostatic forces, but we can observe their effects when magnets attract or repel each other or when charged particles interact.

Non-contact forces differ from contact forces in the way they act on objects. Contact forces require physical contact between objects to exert a force, such as pushing or pulling. On the other hand, non-contact forces can act on objects without any physical contact. They can influence the motion, behavior, or properties of objects from a distance. Examples of contact forces include pushing, pulling, friction, and tension, while examples of non-contact forces include gravitational force, magnetic force, and electrostatic force.