how will you explain presence and absence of motion ?
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in the absence of motion, the force applied is not able to overcome the frictional force and the object does not show any movement and so, in this case, more energy is required to overcome the frictional force
in the presence of motion, the applied force is greater than the frictional force and the object shows movement
in the presence of motion, the applied force is greater than the frictional force and the object shows movement
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