The friction between the sole of the shoes and the ground helps us to move forward when we walk. Our legs provide a backward force and in response, the force of friction propels us in the forward direction. The more friction, the better the walking experience. That is why running shoes always have strong grips and sometimes even spikes on them.
The friction between the nail and the wall creates the grip to hold the nail in place. Without friction, a nail fixed on a wall will fall down. Disk brakes work on the concept of friction. What happens is, the moment you apply the brakes, the brake pad is made to rub against the rotor or disk of the wheels using a hydraulic system. As a result, friction is created between the brake pad and the disk which slowly stops the motion of the wheel. Friction between the brake pad and the disk will result in a lot of heat generation.
To overcome this problem, holes are designed in the brake pads for faster heat dissipation. Friction is a necessary evil. The friction between the rope and the pulley allows us to control the rotation of the wheel. In the absence of friction, the rope would have slipped making it difficult to control. The force of friction stops the ladder from slipping. The ladder since it is at an angle with the ground tries to slip but the force of friction provides an opposite force hence stopping it from slipping.
What happens when you hold your pen or pencil? Have you ever tried giving a thought about it? In case you are wondering, the answer to your question lies in the phenomenon of friction. It is the friction which enables us to write. The frictional force is created when the tip of a pen or pencil is brought in contact with the surface of the paper.
In the case of writing with a ball-point pen, some sort of adhesive forces is acting between the ball and ink. When you start writing with a ball-point pen on paper, the ball starts rolling and the ink is deposited on the surface of the paper. The rolling of the ball invites rolling friction to come into play.
Whereas, while writing with a pencil, sliding friction comes into action; and deposits lead on paper. A similar concept is applicable when using an eraser. You apply some force on the eraser which helps in wiping off the desired content. You might have noticed that your hands feel warm when you rub them together for a few seconds? Friction is responsible for generating warmth in your hands. When two hands come in contact and are rubbed against each other, there is some amount of resistance which comes into play.
However, if you just put your hands together, there will be no resistance, hence, no amount of friction. Without examples, you may still wonder or want to more so I have come up with some examples. Due to your luck or special celebration, the store makes a special discount with 25 percent off the price in your spending.
You may need to think of how much would you have to spend with the discount using a fraction. Static, sliding, and rolling friction occur between solid surfaces. Static friction is strongest, followed by sliding friction , and then rolling friction , which is weakest. Fluid friction occurs in fluids, which are liquids or gases. What causes friction? Causes of Friction. Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations.
Adhesion is the molecular force resulting when two materials are brought into close contact with each other. What are the disadvantages of friction?
Disadvantages of friction are:. Oppose motion. Makes engines to consume more fuel, in other words it reduces the efficiency of engines. What are the types of friction? Types of Friction. Different types of motion of the object gives rise to different types of friction. Generally, there are 4 types of friction. They are static friction, sliding friction, rolling friction, and fluid friction. Is friction good or bad? Friction is good as well as bad.
The thing that decide whether it is good or bad is the application. Whether it is helping to carry out the work or resisting the same,decide its nature. For example we are standing steady on the ground, that is because of friction ,in this case friction is good. What is friction and its examples?
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