Question

Whenever the surface bin 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) ony if one of the object is liquid
c) only if one of the two object is gaseous .
d) irrespective of whether the object are solid , liquid or gas​

Answer 1

a

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.

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