Advertisements
Advertisements
Question
Answer the following in detail.
Define friction and explain how it is useful to us.
Advertisements
Solution
Friction is a force that opposes relative motion between two bodies/surfaces in contact with each other. Although friction opposes the motion, it also makes motion possible.
Friction helps us do many things like :
- It helps us in walking. In the absence of friction, we may slip or M.
- Cars and buses are able to move safely on roads due to the friction between the treaded tires of these vehicles and the surface of the road.
- Friction allows us to hold objects with our hands.
- It allows us to write on paper.
- Friction produces heat. In winter, when we rub our cold hands, the heat produced due to friction makes our hands warm.
APPEARS IN
RELATED QUESTIONS
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
What is the cause of friction?
List three ways of reducing friction.
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Tick the most appropriate answer.
Force of friction comes into play when a/an
Tick the most appropriate answer.
Friction is offered by
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
State if the following statement is true or false. Correct the statement if it is false.
Friction has no relation with our walking or running.
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
Complete the analogy.
Knot in a thread : ______ friction :: Ball bearing : ______ friction.
