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.
Advantages of Friction: Friction is responsible for many types of motion. It helps us walk on the ground. Brakes in a car make use of friction to stop the car. Asteroids are burnt in the atmosphere before reaching Earth due to friction. It helps in the generation of heat when we rub our hands.
The force resisting the motion of a rolling body on a surface is known as rolling friction or rolling resistance.
Rolling of ball or wheel on the ground is an example of Rolling friction. Pushing a box across the table is an example of Sliding friction. Friction is the force that opposes the tyre rubber from sliding on the road surface. The friction which resists the motion of an object moving through a fluid or immobile in a moving fluid, as occurs when we fly a kite. The friction of the air is created as it meets and passes over an aeroplane and its components.
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move.
Hence it is considered as a evil. Friction is always useful to us. Friction always works in opposite direction to the relative motion. Friction is dependent on area of contact. Friction is the force resisting the relative motion of any material. Friction is needed to hold every thing in this world for example to walk, to run ,to drive a vehicle , in brake , in washing and in wearing cloth every time we need friction.
Types Of Friction Static Friction. Walking on the hard ground: Friction enables you to walk firmly. It is very difficult to walk on marshy land or sand dunes. Such surfaces offer very little friction to walk. Sandpaper grinding : Rough surfaces and edges are polished using sandpaper to ensure smoothness. The rough and hard surface of the sandpaper breaks the irregularity in the surface thus reducing the roughness of the surface.
This is a very common technique used to grind to reduce friction in wooden surfaces. Cycling on the road : Friction enables you to start, stop, and turn a cycle. The friction makes sure that we do not skid off the road. The irregularities on the tires are an important factor affecting friction. They provide the cycle with the much-needed grip. On a surface where the coefficient of friction is less, this an important factor affecting friction.
You can read this post on the application of friction to learn more about disk brakes. Gripping onto a baseball bat : A good grip is based on how much friction you get between your hands and the bat. The holding position and the roughness of the grip are two factors that affect friction here. Tug of war : Two teams pull each through a rope in between them. There is a lot of friction involved in this sport.
Wear and tear of the shoe : This is perfect friction as a necessary evil example. While friction enables you to walk the same friction can cause wear and tear to your shoes. The ladder against a wall : The ladder against a wall is a very common application of friction in our daily lives. Without friction, the ladder will slide on the floor. Pulley to draw water from the well : The friction between the rope and the pulley makes sure we are able to grip onto the bucket.
Friction welding : The heat produced during friction is used as an application of friction in welding. Gecko on a wall: The gecko lizard is able to climb onto surfaces vertically due to a very strong frictional force between its legs and the wall. Climber plants: The climber variety of plants climb onto surfaces easily due to frictional force. Generally, they use rough surfaces to climb like the bark of trees, etc.
Forest fires: Unwanted forest fires are a result of the friction caused while two trees rub each other. This friction causes a heating effect resulting in fires. Swimming in water : While swimming we encounter fluid friction. There are specific techniques like the angle of dive, hand movement, etc to reduce this friction.
Fluid friction enables you to have a good workout. Water flow in the river : The water flowing in a river experiences friction with the riverbed. Water flow through pipe systems : Fluid friction also affects water flow through pipe systems.
Fluid friction is mostly on the surface of the water flow. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is transferred to the surroundings, causing heating.
Think of what happens when you rub your hands together quickly. The friction warms them up. Bikes, cars and other moving objects experience air resistance as they move. Air resistance is caused by the frictional forces of the air against the vehicle. The faster the vehicle moves, the bigger the air resistance becomes.
There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in fluids, which are liquids or gases. The force that opposes the motion of the object is called the frictional force. Look at the diagram. At first the block is at rest, then the pushing force keeps the block moving. As the block slides over the surface, the frictional force acts on it in the opposite direction.
Friction helps us in writting and making drawings. If there were no friction, we would not be able to hold a pen vertically. It is friction that opposes slipping and helps us to hold the pen.
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