Topic 1: Force of friction
Topic 2: Sliding friction
Topic 3: Rolling friction
Topic 4: Increase of friction
Topic 5: Reduction of friction
Topic 6: Liquid and air friction
Multiple choice questions
Question and answers
Note book
Topic 1: Force of friction
Topic 2: Sliding friction
Topic 3: Rolling friction
Topic 4: Increase of friction
Topic 5: Reduction of friction
Topic 6: Liquid and air friction
Multiple choice questions
Question and answers
Note book