Question
Download Solution PDFWhich one of the following types of friction occurs in an unlubricated journal bearing?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Friction:
When a solid body slides over a stationary solid body, a force is exerted at the surface of contact by the stationary body on the moving body. This force is called the force of friction.
Dry Friction:
- The friction that exists between two surfaces which are not lubricated is known as dry friction.
Static friction acts on objects when they are resting on a surface.
- Sliding friction is friction that acts on objects when they are sliding over a surface. Sliding friction is weaker than static friction.
- Rolling friction is friction that acts on objects when they are rolling over a surface. Rolling friction is much weaker than sliding friction or static friction.
Important Points
Rolling friction is smaller than the sliding friction.
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