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.

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.

Give two examples where friction is undesirable

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. Why Friction Occurs Friction occurs because no surface is perfectly smooth. Even surfaces that look smooth to the unaided eye make look rough or bumpy when viewed under a microscope. Look at the metal surfaces in the Figure below. The aluminum foil is so smooth that it's shiny. However, when highly magnified, the surface of metal appears to be very bumpy. All those mountains and valleys catch and grab the mountains and valleys of any other surface that contacts the metal.

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. Explain which way makes it easier to move the boxes.

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.

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. Friction is a common yet complex force, and its behavior still not completely understood. Still, it is possible to understand the circumstances in which it behaves. Friction is a force that opposes relative motion between systems in contact. There are several forms of friction. One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems and is always in a direction that opposes motion or attempted motion of the systems relative to each other.

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.

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You observe the pencils rolling as the book moves. Explain which way makes it easier to move the boxes. What situation is friction is not needed? When is friction desirable and undesirable in rugby? Sliding friction is friction that acts on objects when they are sliding over a surface. Rotating bearings. Leave the other piece of paper like normal. Physics Project Physics Project. It is friction which holds the nail. What is a banjax?

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You might also like Friction Friction. Classify the following as desirable and undesirable changes. Why are the tyres of cars and trucks treaded? Identify three factors that affect friction. An example of undesirable friction is when a cyclists falls and his face against pavement that skin on the road. The answer is friction. Sliding friction can be useful. Friction Desirable Undesirable. For example, moving parts of a machine, shoes that we wear. Aravindh Kumar. A desirable change is always associated with an undesirable change. 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. What Is Friction? For example, treading of shoes and tires is done to increase friction.