NCERT - 8 - Science :: Friction

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[Author - Anu Nived]

Objective: To teach the students about about friction and types of friction

Subtopics to be covered:

1. Factors affecting friction
2. How to increase and decrease friction
3. Fluid friction

Learning Outcome:

1. Students can relate friction with their day to day life (how ball bearings work, rubbing hands with soil, etc.)

1. They know about the effects of friction

[Author - Kripa S]

http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0855-Vigyan/Chapter-12/index.html (NCERT Hindi Medium)

http://epathshala.nic.in/wp-content/doc/book/flipbook/ClassVIIIFlipbook/0854-Science/Chapter-12/index.html (NCERT English Medium)

https://drive.google.com/open?id=0BzNF2YyqQxJ-cGlYZXA4NzJUZDg (JEPC Board) (Hindi Medium)

[Author - Kripa S]

https://www.youtube.com/watch?v=kvbOmoNXQ44 (force, energy and friction)

https://www.youtube.com/watch?v=q5FEuw6mB8s (friction video 1)

https://www.youtube.com/watch?v=Tz96XD6kQSI (friction video 2)

[Author - Anu Nived]

http://study.com/cimages/multimages/16/rsz_matches-637771_640.png (friction)

https://s-media-cache-ak0.pinimg.com/736x/85/bb/2f/85bb2f70d04627b2b504ce0d4c410358.jpg (static friction)

http://www.hollywoodshoerepair.com/images/beforeAfter_fullSole02.jpg (reduce friction)

http://www.ekshiksha.org.in/images_friction_VIII/figure_17.JPG (fluid friction)

[Author - Kripa S]

1. Make an inclined plane on a smooth floor, or on a table. You may use a wooden board supported by bricks, or books. Put a mark with a pen at any point on the inclined plane. Now let a pencil cell move down from this point. How far does it move on the table before coming to rest? Note down the distance. Now spread a piece of cloth over the table. Make sure that there are no wrinkles in the cloth. Try the activity again.

2. http://www.arvindguptatoys.com/toys/books.html

[Author - Tejashri Khadilkar]

https://drive.google.com/open?id=0B4m07xnDF8Jpamkzd0N0WVdHVjg (Ans key 1)

https://drive.google.com/open?id=0B4m07xnDF8JpNl84Rjl3aC1sMmM (Ans Key 2)

[Author - Tejashri Khadilkar]

https://drive.google.com/open?id=0B4m07xnDF8Jpa04yNEFUa0J3RWc (Worksheet 1)

https://drive.google.com/open?id=0B4m07xnDF8JpelFmNTRPZk5TMlE (Worksheet 2)

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