Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
(a) Give examples to show that friction depends on the nature of two surfaces in contact.
(b) Give an example to show that friction depends on the force with which the two surfaces are pressed together.
(a). Friction depends on the roughness or smoothness of the surfaces. Friction between two rough surfaces is very large as interlocking between two surfaces is in a great amount while the friction between two smooth surfaces is very less as interlocking between two smooth surfaces occurs in a little amount.
This can be illustrated as the example below:
Let us take a wheel and move it on a rough surface and then move it on a smooth surface. Here we observe that the wheel is not moving easily on a rough surface due to large friction as high interlocking occurs between the rough surface and wheel. While the wheel is easily movable on a smooth surface as the friction is very less.
(b). Friction depends on the force with which the two surfaces are pressed together. It is because the heavier objects exert large force to the surface which results in a large amount of interlocking between the two surfaces and produce large friction as compared to the lighter objects.
Example:
Pushing a lighter object on the floor is easier than pushing a heavier one.
495 Views
