Origin of Friction
Trending Questions
Q. Why kabaddi players rub their hands with soil before they start playing?
- For a better grip on their opponent.
- To keep hands dry as soil will absorb the moisture.
- To increase the roughness of the hands.
- To decrease the roughness of the hands.
Q.
Deep grooves in the tyres of a tractor:
Decreases friction
Increase friction
Make it stable
Make it attractive
Q.
Why do kabaddi players rub their hands with soil before they start playing?
Q.
Why are the tyres provided with deep grooves on their surfaces?
Q.
Why is it difficult to walk on sandy soil or marshy soil?
Q. Friction can act between two bodies even when they are not in contact.
- False
- True
Q.
Why do kabaddi players rub their hands with soil?
Q. Frictional force can act between two bodies even when they are not in contact.
- True
- False
Q. Statement I: When a brick is pushed on a soft carpet, there is friction only because of uneven interlocking of surfaces.
Statement II: When a brick is pushed on a soft carpet, there is friction because carpet has a soft surface and can undergo deformations.
Statement II: When a brick is pushed on a soft carpet, there is friction because carpet has a soft surface and can undergo deformations.
- Only statement I is correct.
- Only statement II is correct.
- Both statements I and II are correct.
- Neither statement I nor statement II is correct.
Q. When a soft surface deforms and opposes motion of a body sliding on it, this is known as
- adhesion
- roughness
- plowing effect
- interlocking
Q. Which of the following statements is correct regarding friction between two surfaces in contact?
- Friction can develop between smooth surfaces.
- Friction exists between surfaces only if they are rough.
- Friction is solely because of the interlocking of irregularities.
- Friction exists between surfaces only if they are smooth.
Q. Why is there a high friction between two smooth glass pieces?
- It is due to deformation of the surfaces.
- It is due to bond formation between the surfaces.
- It is due to interlocking between the surfaces.
- It is due to irregularities present on the surfaces.
