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Please login with the same password. Encyclopedia of academic concepts Articles and project ideas Expert opinion on doubts Sample papers, board papers and exam tips Latest updates from education sector. Please choose your registered Email Id. Continue the Learning and Knowledge Sharing journey. Remember me. Login by OTP. Become a member today! Friction between the machine parts produces unwanted noise. Friction comes into play when two irregular surfaces come in contact.
The continuous rubbing of these surfaces together causes it to gradually wear out. Also, much of the applied force or energy is wasted in overcoming the force of friction. Hence, it is considered as evil, but it is necessary too.
Since friction is a resistive force that slows down or prevents motion, it can be a nuisance, because it can hinder motion and cause the need for expending extra energy. Friction can also cause parts in contact to heat up and can cause parts in contact to wear out. Friction also causes overheating of engines.
This accelerates breakdown and decreases efficiency. Increased efficiency demands need increased fuel or energy consumption due to friction. Heat generated due to friction can cause expansion of materials as well. An explanation of friction using a bobsled as an example. A force is needed to start an object moving and to stop it once it is moving. A force can make an object speed up or slow down.
Ans: Opposes motion of a body hence more energy is needed to overcome the friction. Friction causes wear and tear in machinery parts and also cause wastage of electricity and energy. Friction causes moving objects to stop or slow down. The force of friction opposes the motion of an object, causing moving objects to lose energy and slow down. When objects move through a fluid, such as air or water, the fluid exerts a frictional force on the moving object.
The frictional force from a fluid is called a drag force. When one object is sliding on another it starts to slow down due to friction. This means it loses energy. It changes from moving energy also call kinetic energy to heat energy.
Friction can slow things down and stop stationary things from moving. In a frictionless world, more objects would be sliding about, clothes and shoes would be difficult to keep on and it would be very difficult for people or cars to get moving or change direction. Friction produces unnecessary heat leading to the wastage of energy.
The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches.
Friction can be both harmful and helpful, so it may be necessary to decrease or increase friction. Friction is what holds your shoe to the ground. The friction present on the ice is very little, this is the reason why it is hard to walk on the slippery surface of the ice. Writing — A frictional force is created when the tip of the pen comes in contact with the surface of the paper. Water lowers friction. Since friction is a resistance force that slows down or prevents motion, it is necessary in many applications where you might want to hold items or do things and prevent slipping or sliding.
If there was no friction, you would not be able to walk, drive a car, or hold objects. There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving.
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