Friction

Give some examples of smooth and rough surfaces.

What do you mean by fluid friction? How can fluid friction be reduced?

What are the various types of friction? Explain.

Why are the worn-out tyres discarded?

Give some examples to show that friction produces heat.

Explain increasing and decreasing friction with suitable examples.

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?

Write advantages and disadvantages of friction.

What is a measure of static friction?

What is a spring balance?

When the two surfaces are pressed harder, friction increases. Explain why?

How does the friction depend on the nature of the surface?