Video Tutorial on Increasing and Reducing friction

You must have read about Friction in books, but now with Extramarks start learning with the help of videos and animations. These videos are prepared for the students to have a better understanding of the concept. The video for the concept of Increasing and Reducing Friction for class 6 to class 8 is now available at the Extramarks website. To get access to these videos get yourself registered with Extramarks.
https://www.youtube.com/watch?v=M0W04bUSvAc