Friction Apparatus investigating frictions quantitatively
Friction is defined as the force that resists relative motion between the surfaces in contact when they move past each other. Friction is caused due to irregularities on the two surfaces in contact. when one object moves over the other, these irregularities on the surface get entangled, giving rise to friction. The greater the roughness, the more irregularities and the more significant will be the friction.Friction is helpful in most cases. As a force, friction depends on two external factors. One, Friction is dependent on the smoothness or roughness of the two surfaces between in contact with each other. When the surface is smooth, the friction decreases. While the surface is rough, the friction increases.The other, friction depends on the force that is acting on these surfaces.Friction increases when the force is applied along with the irregularities.There are four types of friction: Static friction, Sliding friction, Rolling friction and Fluid friction. Static friction is the friction that acts between the surfaces when they are at rest with respect to each other.In contrast, sliding friction is the resistance created between any two objects when sliding against each other. Similarly, Rolling friction is the force which resists the motion of a ball or wheel. While, Fluid friction is the friction that exists between the layers of the fluid when they are moving relative to each other.