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Substances are called lubricants which are used to
- a)increase friction
- b)decrease friction
- c)increase or decrease friction
- d)none of these.
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Substances are called lubricants which are used toa)increase frictionb...
A lubricant is a substance, usually organic, introduced to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces.
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Substances are called lubricants which are used toa)increase frictionb...
It is used to decrease friction, so that the movements in machines go smooth and fast.
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Substances are called lubricants which are used toa)increase frictionb...
Decrease Friction
Lubricants are substances that are used to decrease friction between two surfaces in contact with each other. They help in reducing the resistance between the surfaces, allowing them to move more smoothly and easily.
How Lubricants Decrease Friction
1. Lubricants form a thin layer between the two surfaces, acting as a barrier that reduces direct contact and friction.
2. This layer also helps in distributing the load evenly, preventing excessive wear and tear on the surfaces.
3. Lubricants also help in dissipating heat generated due to friction, further reducing the chances of damage to the surfaces.
Types of Lubricants
There are various types of lubricants used for different applications, such as:
- Solid lubricants like graphite and molybdenum disulfide
- Liquid lubricants like oils and greases
- Semi-solid lubricants like pastes and gels
Examples of Lubricants
Common examples of lubricants include:
- Engine oil used in automobiles
- Grease used in machinery
- Cooking oil used in food preparation
Importance of Lubricants
Using lubricants is crucial in reducing friction and wear between moving parts, which helps in increasing the longevity and efficiency of the machinery or equipment. It also helps in improving the overall performance and reducing maintenance costs.
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Substances are called lubricants which are used toa)increase frictionb)decrease frictionc)increase or decrease frictiond)none of these.Correct answer is option 'B'. Can you explain this answer?
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