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प्रश्न
Fill in the blank.
Friction depends upon the ............... of an object.
उत्तर
Friction depends upon the weight of an object.
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संबंधित प्रश्न
List three ways of reducing friction.
Define rolling friction
A body needs a force F1 just to start moving on a surface, a force F2 to continue its motion and a force F3 to roll on the surface. What is
- the static friction
- sliding friction and
- rolling friction? State whether F2 is equal, less than or greater than (1) F1 and (2) F3.
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.
Fill in the blank.
Rolling friction is ........... than sliding friction.
Answer the following in detail.
Describe three different ways by which friction can be increased to help us in various situations?
Explain how friction can be minimized.
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.
