Where is friction desirable

For example, if you are hiking in the woods, there is static friction between your shoes and the trail each time you put down your foot see Figure below. Without this static friction, your feet would slip out from under you, making it difficult to walk. In fact, that's exactly what happens if you try to walk on ice.

That's because ice is very slippery and offers very little friction. Can you think of other examples of static friction? One example is the friction that helps the girls climb the rock wall in the picture above. Static friction keeps their hands and feet from slipping. Sliding Friction Sliding friction is friction that acts on objects when they are sliding over a surface. Sliding friction is weaker than static friction. That's why it's easier to slide a piece of furniture over the floor after you start it moving than it is to get it moving in the first place.

Sliding friction can be useful. For example, you use sliding friction when you write with a pencil. The pencil "lead" slides easily over the paper, but there's just enough friction between the pencil and paper to leave a mark.

How does sliding friction help you ride a bike? There is sliding friction between the brake pads and bike rims each time you use your bike's brakes. This friction slows the rolling wheels so you can stop. Rolling Friction Rolling friction is friction that acts on objects when they are rolling over a surface.

Rolling friction is much weaker than sliding friction or static friction. This explains why most forms of ground transportation use wheels, including bicycles, cars, 4-wheelers, roller skates, scooters, and skateboards. Ball bearings are another use of rolling friction.

You can see what they look like in the Figure below. They let parts of a wheel or other machine roll rather than slide over on another. The ball bearings in this wheel reduce friction between the inner and outer cylinders when they turn. Fluid Friction Fluid friction is friction that acts on objects that are moving through a fluid. A fluid is a substance that can flow and take the shape of its container. Fluids include liquids and gases.

If you've ever tried to push your open hand through the water in a tub or pool, then you've experienced fluid friction. You can feel the resistance of the water against your hand. Look at the skydiver in the Figure below. He's falling toward Earth with a parachute. Resistance of the air against the parachute slows his descent.

The faster or larger a moving object is, the greater is the fluid friction resisting its motion. That's why there is greater air resistance against the parachute than the skydiver's body. Fun with Friction: Activity 1: Take a few pencils which are cylindrical in shape. Place them parallel to each other on a table. Place a thick book over it. Now push the book. Currently only available for.

Class 10 Class Give two examples where friction is undesirable. Switch Flag Bookmark. Explain why sportsmen use shoes with spikes. Explain why sliding friction is less than static friction. Copy Link. Give an example. With the help of diagram, explain the undesired vibrations. Give two examples of undesirable vibrati What is the change in glass breaking? What is friction?

Explain it with an example. Classify the following as desirable and undesirable changes. Melting of ice cream. Keeps systems from oscillating out of control. Allows for climbing mountains. Allows for formation of stars and planets. Undesirable: Increases the amount of energy necessary to do any job. The duration of Desirable is 1. What do you mean by "desirable personal"? Explain why modulation is necessary or desirable. She moved so elegantly that she was desirable to dance with.

It is desirable because it is easier to prepare. Desirable was created on Static Friction and Kinetic Friction. Static Friction is what friction that slows you down. While Kinetic friction is sliding friction.

What some desirable food habits. He thought his new date was very desirable. Desirable Daughters was created in Log in. Study now. See Answer. Best Answer. Friction is desirable on your tyres and brakes. Tyres need to grip the road, to push the car forward, stop and go round corners. Brakes need friction to stop the wheels turning. Study guides. Health 21 cards. Im with someone in the army and we want to get married asap but would he get into trouble he is 21 and im What does teachorous mean.

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