Mark the direction of frictional force and mention the kind of frictional force that comes into play in each case. Please give a short ans .
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Frictional force acts in a horizontally opposite direction to the direction of motion.
Static friction comes into being when two objects are at rest with respect to each other .
Rolling friction comes into being when one object rolls over the other.
Sliding friction comes into being when one object slides over the other.
Fluid friction is the friction between an object on a liquid surface and the liquid and it depends upon the viscosity of liquid.
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