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
Fill in the blank.
We use ball bearings to .................. the friction.
List three ways of reducing friction.
Define sliding friction
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.
Answer the following in short.
Define force. Write its SI unit.
Fill in the blank.
Friction depends upon the ............... of an object.
State if the following statement is true or false. Correct the statement if it is false.
Friction helps us to grip the objects in our hand.
Answer the following in short.
Define rolling friction and give an example where rolling. friction comes into play.
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
