Question

Write the measures to reducing friction and increasing friction..

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Answer 1

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Write the measures to reducing friction and increasing friction.

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Friction:- Friction is the force that resists motion when the surface of one object comes in contact with the surface of another.

Frictional force refers to the force generated by two surfaces that contacts and slide against each other.

For our necessity sometimes friction has to be increased and sometimes it has to be decreased.

Reducing friction:-

The measures we may take to reduce friction are:

• 1. Make the surfaces as smooth as possible where friction is taking place. On smooth surfaces sliding friction is less.
• 2. Oil, Mobil or grease like materials are called greasy materials or lubricants. The friction is reduced to a great extent if lubricants are used in between the two surfaces.
• 3. Using wheel friction can be reduced. If wheel is used we can do work by very small rolling friction instead of large sliding friction. It is possible to reduce friction to a great extent by using ball bearings in the rotating wheel, using the rolling friction of the small steel balls instead of the direct friction.
• 4. The design of the fast moving vehicles like car, plane is done in such a way that the wind can flow over the streamline surface without creating any friction.
• 5. The surfaces where friction occurs touch one another in a very small region, then friction can be reduced.
• 6. We have seen that if force is applied on the two frictional surfaces, friction is increased. Therefore if vertically applied force is reduced, friction can be reduced.

Increasing friction:-

If the procedures that are taken to reduce friction are not done or if the opposite steps are taken then friction will be increased. Therefore the necessary steps we take to increase the friction are:

• 1. Roughening the two surfaces where friction in present.
• 2. Preasing the two surfaces more strongly where friction is present.
• 3. Make the surfaces stationary by stopping the motion which is present on the two frictional surfaces. Because static friction is more than the sliding friction.
• 4. Making grooves or waves on the frictional surfaces. Then it can grip the bottom tightly. If there is water or liquid, it enters the grooves thus increasing the friction of the surface.
• 5. To increase the density of air or water.
• 6. To increase the frictional area in air or water.
• 7. To remove wheel or ball bearing.

Know More:-

There are different types of frictional forces. The friction that takes place between solid surfaces is classified as:-

• Static Friction
• Kinetic Friction
• Rolling Friction and 
• Sliding Friction.

A few factors affecting the frictional force:

• These forces are mainly affected by the surface texture and amount of force impelling them together.
• The angle and position of the object affect the amount of frictional force.
• If an object is placed flat against an object, then the frictional force will be equal to the weight of the object.
• If an object is pushed against the surface, then the frictional force will be increased and becomes more than the weight of the object.