can u explain to me why friction is sometimes useful, and why friction is also nuisance
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friction is very useful because if there will be no friction,no moving body could stop.
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Friction is useful
First things first, the phone which you are using to read this answer (assuming you are using app) is held properly in your hands just because of friction.
Majority of the cases, friction is useless because of the energy losses involved when 2 components interact with each other.
But there are a lot many things which would be impossible if friction did not exist.
-You cannot write on a piece of paper
-You cannot hold the glass of water in your hands
-You would slip on the floor trying to walk
-You cannot stop your vehicle after applying the brakes
-You would start slipping from your chair
-You cannot open up the bottle cap to drink water
-You would go crashing in to the driver's seat while standing in a bus just like Harry in HP-Part-3
-You cannot machine components of extreme accuracy
-Hair Styling would be a mere dream
-Lastly, your pants won't stay on their assigned place (embarrassing moment especially in front of your crush)
Friction can cause problems or be a nuisance that you try to minimize.
Makes movement difficult
Any time you want to move an object, friction can make the job more difficult. Excess friction can make it difficult to slide a box across the floor, ride a bicycle or walk through deep snow.
An automobile would not move forward very well unless its friction was not reduced. Oil is needed to lubricate the engine and allow its parts to move easily. Oil and ball bearings are also used in the wheels, so they will turn with little friction.
Wastes energy
In any type of vehicle--such as a car, boat or airplane--excess friction means that extra fuel must be used to power the vehicle. In other words, fuel or energy is being wasted because of the friction.
Fluid friction or air resistance can greatly reduce the gas mileage in an automobile. Cars are streamlined to reduce friction. But driving at highway speeds with your windows open can create enough drag on the car to greatly reduce your gas mileage.
Heats parts
The Law of Conservation of Energy states that the amount of energy remains constant. Thus, the energy that is "lost" to friction in trying to move an object is really turned to heat energy. The friction of parts rubbing together creates heat.
You've seen how people will try to start a fire by vigorously rubbing two sticks together. Or perhaps you've seen an automobile spin its wheels so much that the tires start to smoke. These are examples of friction creating heat energy. Just rub your hands together to create the same effect.
Besides the problem of losing energy to heat, there is also the threat of a part overheating due to friction. This can cause damage to a machine.
Wears things out
Any device that has moving parts can wear out rapidly due to friction. Lubrication is used not only to allow parts to move easier but also to prevent them from wearing out. Some other examples of materials wearing out due to friction include the soles of your shoes and a pencil eraser.
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Friction is useful
First things first, the phone which you are using to read this answer (assuming you are using app) is held properly in your hands just because of friction.
Majority of the cases, friction is useless because of the energy losses involved when 2 components interact with each other.
But there are a lot many things which would be impossible if friction did not exist.
-You cannot write on a piece of paper
-You cannot hold the glass of water in your hands
-You would slip on the floor trying to walk
-You cannot stop your vehicle after applying the brakes
-You would start slipping from your chair
-You cannot open up the bottle cap to drink water
-You would go crashing in to the driver's seat while standing in a bus just like Harry in HP-Part-3
-You cannot machine components of extreme accuracy
-Hair Styling would be a mere dream
-Lastly, your pants won't stay on their assigned place (embarrassing moment especially in front of your crush)
Friction can cause problems or be a nuisance that you try to minimize.
Makes movement difficult
Any time you want to move an object, friction can make the job more difficult. Excess friction can make it difficult to slide a box across the floor, ride a bicycle or walk through deep snow.
An automobile would not move forward very well unless its friction was not reduced. Oil is needed to lubricate the engine and allow its parts to move easily. Oil and ball bearings are also used in the wheels, so they will turn with little friction.
Wastes energy
In any type of vehicle--such as a car, boat or airplane--excess friction means that extra fuel must be used to power the vehicle. In other words, fuel or energy is being wasted because of the friction.
Fluid friction or air resistance can greatly reduce the gas mileage in an automobile. Cars are streamlined to reduce friction. But driving at highway speeds with your windows open can create enough drag on the car to greatly reduce your gas mileage.
Heats parts
The Law of Conservation of Energy states that the amount of energy remains constant. Thus, the energy that is "lost" to friction in trying to move an object is really turned to heat energy. The friction of parts rubbing together creates heat.
You've seen how people will try to start a fire by vigorously rubbing two sticks together. Or perhaps you've seen an automobile spin its wheels so much that the tires start to smoke. These are examples of friction creating heat energy. Just rub your hands together to create the same effect.
Besides the problem of losing energy to heat, there is also the threat of a part overheating due to friction. This can cause damage to a machine.
Wears things out
Any device that has moving parts can wear out rapidly due to friction. Lubrication is used not only to allow parts to move easier but also to prevent them from wearing out. Some other examples of materials wearing out due to friction include the soles of your shoes and a pencil eraser.
HOPE THIS HELPS YOU.
PLEASE MARK ME AS BRAINLIST
Anonymous:
OMg thx
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