Friction Understanding at Molecular Level
Trending Questions
Q. Two blocks A and B of masses mA and mB have velocity v and 2v, respectively, at a a given instant. A horizontal force F acts on the block A. There is no friction between ground and block B and coefficient of friction between A and B is μ. The friction
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1046626/original_27.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1046626/original_27.png)
- on A, supports its motion.
- on B, opposes its motion relative to A.
- on B, opposes its motion.
- opposes the motion of both.
Q. Two blocks A and B of masses mA and mB have velocity v and 2v, respectively, at a a given instant. A horizontal force F acts on the block A. There is no friction between ground and block B and coefficient of friction between A and B is μ. The friction
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1046626/original_27.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1046626/original_27.png)
- on A, supports its motion.
- on B, opposes its motion relative to A.
- on B, opposes its motion.
- opposes the motion of both.
Q. If two surfaces are polished highly smooth, the friction between them increases.
- True
- False