Give two examples where friction is undesirable

Can the same change be desirable at one time and undesirable at another? Explain with as an example. The eddy current have both desirable and undesirable effects.

Wiki User. An example of undesirable friction is when a cyclists falls and his face against pavement that skin on the road. Undesirable friction is something that is not controllable. The force of friction between two objects is the product of the normal force and the coefficient of friction. The normal force is the component of force that is perpendicular to the plane of friction. The coefficient of friction is specific to the two materials, in this example the block of wood and the floor.

Give two examples where friction is undesirable

If there is no friction between the contact surfaces, then a body can't be stopped without the application of external force. In the same time a person can't walk on the ground if there is no friction between the ground and our legs also no vehicle can run on the ground without the help of friction. Desirable effects of friction are: 1. It helps us in movement. It helps to stop a moving object like a car. Friction is Undesirable: A friction is undesirable during ice skating or when a block is lifted or put down on the truck with the help of some inclined plane. If the friction is more between the block and inclined surface, then a large force is required to push the block on the plane. Thus friction is desirable or undesirable depending upon the condition and types of work. Undesirable effects of friction are: 1. Friction produces a lot of heat. Friction causes wear and tear of objects. To overcome friction a lot of energy is wasted. Open navigation menu. Close suggestions Search Search. User Settings.

The flat piece of paper will flutter down more slowly because it has more surface area to create friction or drag on the air as it drops.

Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engine can cause the parts to wear out. Other examples of friction are illustrated in the two Figures below Friction between the graphite in a pencil and a sheet of paper leaves a mark on the paper. Friction between a bicycle brake pad and the rim of a wheel causes the wheel to stop turning. Did you ever rub your hands together to warm them up, Why does this make your hands warmer? The answer is friction.

Friction is a force that resists movement between surfaces in contact. It is caused by the interactions between the molecules that make up objects. There are three types of friction: Static Friction , which resists motion between surfaces that are not moving with respect to each other at their point of contact; Kinetic Friction , which resists motion between surfaces that are moving with respect to each other at their point of contact; and fluid friction, which resists the motion of bodies moving through gases and liquids. All types of friction depend on the materials comprising the surfaces of the objects and substances involved, as well as on the normal force they exert on each other that is, the force with which they are pressed together. Friction between surfaces is largely the result of adhesive forces between them that must be overcome to move them. All surfaces are rough on a microscopic level, so when two surfaces are pressed against each other, they form only a few points of contact. At these points of contact, the molecules of each surface are attracted to the molecules of the other due to several types of inter-molecular forces. The greater the normal force between the surfaces that is, the harder they are pressed together , the greater the number and size of these points of contact, and therefore, the greater the friction force between them. In addition to these adhesive forces, friction is also caused in part by deformation that occurs when materials are pressed together. Both of these mechanisms contribute to the conversion of kinetic energy to thermal energy; the molecules' interactions channel the kinetic energy of the macroscopic objects into the kinetic energy of individual molecules.

Give two examples where friction is undesirable

Friction is a force that is around us all the time that opposes relative motion between surfaces in contact but also allows us to move which you have discovered if you have ever tried to walk on ice. While a common force, the behavior of friction is actually very complicated and is still not completely understood. We have to rely heavily on observations for whatever understandings we can gain. However, we can still deal with its more elementary general characteristics and understand the circumstances in which it behaves. Friction is a force that opposes relative motion between surfaces in contact. One of the simpler characteristics of friction is that it is parallel to the contact surface between surfaces and always in a direction that opposes motion or attempted motion of the systems relative to each other. If two surfaces are in contact and moving relative to one another, then the friction between them is called kinetic friction.

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When is friction desirable and undesirable in rugby? Friction is also desirable when making the tackle. Jump to Page. Copy Link. To overcome friction a lot of energy is wasted. Continue Learning about General Science. Orotic aciduria type II reflects the deficiency of the enzyme: A Orota Without friction they would slip off which is dangerous. Desirable in scrummaging when the two packs form together. The pencil "lead" slides easily over the paper, but there's just enough friction between the pencil and paper to leave a mark. Resistance of the air against the parachute slows his descent. Any bearing in your car's engine.

When a body is in motion, it has resistance because the body interacts with its surroundings. This resistance is a force of friction. Friction opposes relative motion between systems in contact but also allows us to move, a concept that becomes obvious if you try to walk on ice.

Rolling Friction: by R. What are 5 types of friction? A substance that is introduced between two surfaces in contact, to reduce friction, is called a lubricant. Friction is a force that opposes motion between any surfaces that are touching. If you've ever tried to push your open hand through the water in a tub or pool, then you've experienced fluid friction. The eddy current have both desirable and undesirable effects. Rolling friction is friction that acts on objects when they are rolling over a surface. Open navigation menu. What is one situation that friction is useful? Thus friction is desirable or undesirable depending upon the condition and types of work. It helps us in movement. Chapter Chosen Friction. Personal Growth Documents. Heat, in some cases.