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प्रश्न
What is the cause of friction?
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उत्तर
The cause of friction is the interlocking of the irregular projections on the two surfaces in contact.
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संबंधित प्रश्न
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?
Fill in the blank.
We use ball bearings to .................. the friction.
Give three examples to illustrate that friction is a necessary evil.
Answer the following.
What do you understand by a force?
Tick the most appropriate answer
Friction always
Fill in the blank.
Rolling friction is ........... than sliding friction.
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.
State if the following statement is true or false. Correct the statement if it is false.
Friction is offered by all the three states of matter.
In the following figure, a boy is shown pushing the box from right to left. The force of friction will act on the box
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.
