Advertisements
Advertisements
प्रश्न
Select the correct alternative.
Friction is reduced by
विकल्प
making the surfaces wet
making the surfaces dry
making the surfaces rough
sprinkling sand on the surface.
Advertisements
उत्तर
making the surfaces wet
APPEARS IN
संबंधित प्रश्न
When a glass rod is rubbed with a piece of silk cloth the rod ______.
Write true or false.
Liquids offer more friction than the gases.
Fill in the blank.
More the roughness of a surface, greater is the ........................
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Friction depends upon the ............... of an object.
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
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.
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.
