Friction can be reduced by changing over froma)Dynamic to0 staticb)Rolling to slidingc)Sliding to rollingd)None of theseCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

It is because in case of sliding there is more area in comparison to rolling ,( less is the area of contact, less is the friction) hence friction reduced by changing from sliding to rolling .

Answer

Friction can be reduced by changing from sliding to rolling. Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.
Therefore the correct option is c) SLIDING TO ROLLING.

Answer

Correct option is C
because in case of sliding there is more area in comparison to rolling ,( less the area of contact less the friction) hence friction reduced by changing from sliding to rolling .

Answer

Friction and its types:
Friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It is caused by the irregularities and interlocking of the surfaces in contact. Friction can be classified into several types based on the nature of the surfaces in contact and the relative motion between them. The main types of friction are static friction, sliding friction, rolling friction, and fluid friction.

Static friction:
Static friction is the frictional force that prevents the motion of an object when a force is applied to it. It acts in the opposite direction of the applied force and increases or decreases to match the applied force until the object starts moving. Static friction is generally greater than sliding friction and rolling friction.

Sliding friction:
Sliding friction is the frictional force that opposes the motion of an object sliding over a surface. It occurs when two solid surfaces slide against each other. Sliding friction is generally lower than static friction but higher than rolling friction.

Rolling friction:
Rolling friction is the frictional force that opposes the rolling motion of an object on a surface. It occurs when a round object, such as a wheel or a ball, rolls over a surface. Rolling friction is generally lower than both static friction and sliding friction.

Reducing friction:
Friction can be reduced by various methods, such as using lubricants, polishing the surfaces, or changing the type of friction. In this case, the correct option is 'c) Sliding to rolling'.

Explanation:
When an object slides over a surface, the sliding friction between the two surfaces is relatively high. However, when the object is changed to roll instead of slide, the friction changes from sliding friction to rolling friction. Rolling friction is generally lower than sliding friction, which means that the overall friction between the object and the surface is reduced.

When an object rolls, only a small portion of the object's surface is in contact with the surface it is rolling on. This reduces the area of contact and decreases the friction. Additionally, the rolling motion allows for smoother movement compared to sliding, reducing the interlocking of surface irregularities and further reducing friction.

By changing from sliding to rolling, the friction can be significantly reduced, making it easier for the object to move. This is why the correct answer to the question is option 'C' - Sliding to rolling.

Answer

Friction can be reduced by changing from sliding to rolling. Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.

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