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Give some examples of smooth and rough surfaces.
Explain increasing and decreasing friction with suitable examples.
Give some examples to show that friction produces heat.
What are the various types of friction? Explain.
When the two surfaces are pressed harder, friction increases. Explain why?
What do you mean by fluid friction? How can fluid friction be reduced?
If we push the book on the table, it stops after sometime. Why?
What are the two factors on which the force of friction depends?
Why are the worn-out tyres discarded?
How does the friction depend on the nature of the surface?
What is a measure of static friction?
What is a spring balance?
Write advantages and disadvantages of friction.