Surface Irregularities
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Consider the following statements:
Statement 1: Rough surfaces generally have more friction between them.
Statement 2: When we attempt to slide one surface over another, we have to apply a force to overcome interlocking between the irregularities present on the surfaces.
Choose the correct option.
Statement 1 is correct but statement 2 is incorrect.
- Both the statements are correct.
Statement 1 is incorrect but statement 2 is correct.
- Both the statements are incorrect.
Statement 2: Plowing effect is seen when a soft object deforms due to another object in its contact.
Choose the correct option.
- Only statement 1 is correct.
- Only statement 2 is correct.
- Both statements are incorrect.
- Both statements are correct.
- Stainless Steel
- Surface of an ice-cube
- Sandpaper
- Mirror
- Ring shaped flow
- Streamline shaped flow
- Star shaped flow
- Dumbell shaped flow
For the same pair of bodies, the correct relation between different types of friction is:
- Static friction > rolling friction > sliding friction.
- Sliding friction > static friction > rolling friction.
Static friction > sliding friction > rolling friction.
Sliding friction > rolling friction > static friction.
What happens to interlocking between two surfaces in contact when a lubricant is applied between them?
- Interlocking decreases
- Cannot be determined
No change
Interlocking increases
Arrange the following in increasing order of surface roughness:
- Sandpaper
- Polished steel
- Cardboard
- Sandpaper < Cardboard < Polished steel
- Polished steel < Cardboard < Sandpaper
- Polished steel < Sandpaper < Cardboard
- Cardboard < Sandpaper < Polished steel
- Softness
- Hardness
- Roughness
- Smoothness
- Glass tumbler
- Silk cloth
- Rusty iron piece
- Plane mirror
- Sandpaper
- Uneven rock
- Marble tile
- Granite tile
- Glass tumbler
- Sand paper
- Uneven rock
- Silk cloth