What is friction and write some advantages and disadvantages of friction
Answers
Answer:
Friction is the resistance to motion of one object moving relative to another.
ADVANTAGES OF FRICTION
Friction plays a vital role in our daily life. Without friction we are handicap.
1. It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it becomes difficult to walk due to low friction of ice.
2. We can not fix nail in the wood or wall if there is no friction. It is friction which holds the nail.
3. A horse can not pull a cart unless friction furnishes him a secure Foothold.
DISADVANTAGES OF FRICTION
Despite the fact that the friction is very important in our daily life, it also has some disadvantages like:
1. The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy.
2. Due to friction we have to exert more power in machines.
3. It opposes the motion.
4. Due to friction, noise is also produced in machines.
5. Due to friction, engines of automobiles consume more fuel which is a money loss
Answer:
Advantage
Friction plays a vital role in life on Earth. Without friction almost nothing could be done.
1-It is difficult to walk on a slippery road due to low friction. When a person moves on ice, it becomes difficult to walk due to the low friction of the ice with the shoe. The friction between the sole of a shoe and the surface of the ground prevents us from slipping.
To improve the friction, it is advisable to wear shoes with rough soles while walking on slippery floors.
For a similar reason, the crutches are provided with rubber tips on their underside to provide sufficient friction.
2-By the time, meteorologists found that friction decreases surface wind speeds, making them less volatile.
Friction also encourages surface air masses to merge and rise, which helps the rain cycle. Rugged terrain, trees and buildings create friction that acts on wind speed.
3-The friction between the feet of the animals and the ground makes it easier to run and walk. In fact, without friction, the animals would have difficulty standing.
It is like someone's scenario sliding on a banana peel: if there is no friction, people and animals can not walk.
They could not plant their feet firmly on the ground. There would be no friction (ie traction) to prevent feet from sliding all over the place.
4-In everyday life, friction between the road and the tires of a car helps the driver to control the speed of the vehicle. By applying the brakes, it allows you to slow down the car to a stop.
5-Friction also makes writing possible on paper. When a pencil is used, the friction of the paper causes the lead of the pencil to dry.
When a pen is used, the friction activates the ball to roll, thus releasing the ink from the pen.
6-While in space, meteors and comets do not have the strength to stop, striking the atmosphere of the Earth, not only the friction of the atmosphere slows them, but tends to separate them into smaller pieces, thus diminishing their impact On the surface of the Earth.
7-Friction welding works by using a compression force together with friction-induced heat to join two surfaces together.
Friction induced heating smoothes the metal components to make them moldable.
This welding method allows you to join different materials (eg wood and metal) and increase productivity in manufacturing industries.
8-In a camping or survival environment, friction can be used to start fires.
The friction created by rubbing two pieces of wood heats the wood until it reaches the combustion temperature (about 425 degrees Celsius or 800 degrees Fahrenheit) and ignites.
For this to work, the wood must be fairly dry and have little or no resin present.
9-The ridges on the skin of our fingers and palms allow us to grasp and hold objects due to friction.
10-The nail could not be fixed on the wood or wall if there is no friction nor a horse could not pull a car unless the friction provided a secure point of support.
Disadvantages
Although friction is very important in everyday life, it also has some disadvantages like:
1-The main disadvantage of friction is that it produces heat in various parts of the machines. In this way, useful energy is expended as a loss in thermal energy.
For example, car engines become warmer due to friction. This could overheat and damage them.
2-Due to friction, you have to exert more power in the machines, to overcome the losses.
3-Opposes the motion, ie, counteracts the movement, so it takes more energy to move.
4-Due to friction, noise occurs in machines.
5-By friction, the engines of cars consume more fuel, which causes a loss of money.
6-The efficiency of a machine decreases, since part of the energy input loses in heat by friction.
7-Forest fires are due to friction between the branches of the trees.
8-Extra friction makes it difficult to move an object, such as sliding a box across the ground or walking in deep snow.
9-Any device that has moving parts can quickly wear out due to friction. An example of friction wears, is a rough draft.
10-The friction heat product may be sufficient to cause abrasion of the skin, resulting in chafing.