The direction of frictional force
acting in a body which can slide on a fixed surface is :
किसी वस्तु जो किसी निश्चित सतह पर फिसल सकती है, उसमें लगने वाले घर्षण बल की दिशा है:
In the direction of motion
Normal to the direction of motion
unpredictable
Opposite to the direction of motion
Opposite to the direction of motion
The direction of frictional force (f = 
, always acts opposite to the direction of motion of the
body.
Hence, the correct option is (D).
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