GENERAL KNOWLEDGE

Detailed explanation-1: -When two rough surfaces in contact move against each other, a force is exerted between them that resists this motion. This is called friction force. For example, when you try to push a table across the floor, friction acts between the legs of the table and the floor.

Detailed explanation-2: -Friction is the force that one surface exerts on another with the two surfaces rubbing together. The strength of the force of friction depends on the following two factors: The types of surfaces that are touching.

Detailed explanation-3: -3 Friction When two surfaces rub together, the irregularities of one surface get caught on those of the other surface. The force that one surface exerts on another when the two rub against each other is called Friction. Friction acts in a direction opposite to the object’s direction of motion.

Detailed explanation-4: -For instance, when two objects rub together, friction causes some of the energy of motion to be converted into heat. This is why rubbing two sticks together will eventually produce a fire.

Detailed explanation-5: -Normal force is defined as the force that a surface exerts on an object. If the object is at rest, net force on the object is equal to zero; therefore, the downward force (weight) must be equal to the upward force (normal force).