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. A desirable change is always associated with an undesirable change.

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

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.

Friction Friction. For example, you use sliding friction when you write with a pencil.

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.

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.

Give two examples where friction is undesirable

Have you ever wondered what is friction and force? How do we relate them to our day-to-day activities? Friction is a natural phenomenon that occurs when there is contact between two objects. Where there is friction, there will be a loss of energy. Friction occurs due to the roughness of the rubbing surface. During friction, the molecules in the surface will interact with each other. The force of friction will depend on the material of the rubbing surface. It also depends on the speed or intensity at which two surfaces come into contact with each other. To overcome friction, you need to work more and put extra effort. In contrast, force is any interaction that tends to change the motion of the object.

Japanese porn collection

Ball bearings are another use of rolling friction. Flag for inappropriate content. Orotic aciduria type II reflects the deficiency of the enzyme: A Orota The wearing away of objects. Friction is the force that opposes motion between any surfaces that are in contact. Without friction, you would not be able to walk, the wheels on a vehicle would have no grip on a road surfacing and the vehicle would not be able to move forward. There are instances in daily life where friction is a necessity. Tower of Babel Tower of Babel. Study now See answers 7. Open navigation menu.

It may bring up images of slipping around on ice or of figuring out how high you can angle your binder before the pencil rolls off.

Friction can be minimized by using lubricants like oil and grease and by using ball bearing between machine parts. Define friction, and explain why it occurs. Now you should have room to add a bit more rice to the bottle. Rotating bearings. View Solution. Notes for Friction. A force that will work against motion in every situation? Outside wooden steps may get slippery when they are wet. You've got to add more friction. An example of undesirable friction is when a cyclists falls and his face against pavement that skin on the road. You can see what they look like in the Figure below. If there is no friction between the contact surfaces then a body cant be stopped without the application of external force. In addition, there is a static coefficient of friction applicable to a stationary situation and a kinetic coefficient of friction applicable when the object is already moving. Desirable in scrummaging when the two packs form together. What is undesirable?