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Frictional Force

Whenever the ...

Question

Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play. This happens ___.

A

only if the objects are solid

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B

only if one of the two objects is liquid

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C

only if one of the two objects is gaseous

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D

irrespective of whether the objects are solids, liquids or gases

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Solution

The correct option is D irrespective of whether the objects are solids, liquids or gases
Force of friction acts in solids, liquids and gases and opposes the motion with respect to each other.

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Similar questions

Q. Question 1
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play

(a) only if the objects are solid.
(b) only if one of the two objects is liquid.
(c) only if one of the two objects is gaseous.
(d) irrespective of whether the objects are solid, liquid or gaseous.

Q. Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play_____

Q. The friction between two surfaces does not depend on one of the following. This one is:
(a) amount of surface area of the two objects which is in contact with each other
(b) weight of the object which tends to move on the surface of other object
(c) degree of smoothness of surfaces of two objects in contact with each other
(d) degree of roughness of surfaces of two objects in contact with each other

Q. We say that interaction of two objects are necessary for a force to come into play. In the other hand we say that non-contact forces can come into play even the objects are not in contact. Interaction is required for a force to come into play or not?

Does the effect of pressure change objects from one state to the other? Or it only changes gases into liquids?

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