Are the magnitude and direction (A-B) same as that of (B-A)?

The magnitude of (A - B) and (B -A) will be same but the direction will be opposite. 

@ shreyasi: good job! keep it up!

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NO

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NO BECAUSE IF WE APPLY SCREW RULE IN

A-B SCREW GOES INWARDS AND IN B-A SCREW COMES OUTWARDS

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