Advertisements
Advertisements
Question
Answer the following in detail.
Write the characteristics of the force of friction?
Advertisements
Solution
Characteristics of the force of friction are :
- Friction opposes the direction of motion.
- It depends on the nature of the surface that is in contact. Rough surfaces offer a greater degree of friction as compared to smooth surfaces. More the roughness of a surface, the greater is the friction.
- Friction depends upon the weight of the object – greater is the weight of the object, greater is frictional force it faces.
- Friction is independent of the area of the surface in contact when the weight remains unchanged.
APPEARS IN
RELATED QUESTIONS
Give examples to show that friction is both a friend and a foe.
Select the correct alternative.
Friction is reduced by
What is the cause of friction?
List three ways of reducing friction.
Answer the following.
What do you understand by a force?
State if the following statement is true or false. Correct the statement if it is false.
If two forces acting in opposite directions on a body arc of equal magnitude, then the body will not move.
Tick the most appropriate answer.
Friction produces
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.
We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
