State whether the following statements are true or false:

Friction can be minimised by using lubricants like oil and grease and by using ball bearing between machine parts.

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept- Friction is a resistive force that causes energy to be dissipated. It can be lowered in the case of solids by reducing various flaws on the surface of two bodies sliding over each other. In the case of fluids, simplifying the shape of bodies aids in friction reduction.
Friction is a resistive force that occurs when two bodies glide over each other. In other words, friction resists the movement of one body over another.
The underlying operating concept of friction is that when two bodies come into touch with each other and attempt to slide over each other, their surfaces may be bumpy and uneven. This causes jerky motion, which is referred to as friction.
Friction is a dissipative force, which means that when two bodies glide over one another, work is done and energy is expended.
Friction can be seen all around us, yet depending on what we're talking about, this phenomenon may or may not be beneficial. For example, in mechanical devices, when separate parts move over one another, friction occurs, which might have serious implications if there is a lot of friction between the various parts.
So, there are certain methods for reducing the amount of friction in a system.
1. Surface smoothing: By polishing a surface, we can remove excessive dents or ridges that enhance friction.
2. Lubrication: Lubricants have an oily feel that aids in friction reduction. They fill gaps and ridges, making sliding easier.
3. Streamlining: Friction can be decreased by making the shape of items that must move through fluids such as liquid and air streamline. Aeroplanes, for example, have streamlined bodies to reduce friction caused by the atmosphere.
4. Rolling motion: Friction is much lower when bodies roll over each other than when bodies slide over each other.
Further information:
All of the forces we encounter can be derived from the four fundamental forces of nature: gravity, electromagnetism, and strong and weak nuclear forces. Friction is caused by the electromagnetic force of nature. Frictional force is caused by electromagnetic force between charged particles in the atoms of substances.
Hence,the given statement is true.

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