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    Diksha Singh's Avatar
    Diksha Singh Posts: 6, Reputation: 1
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    #1

    Jun 19, 2015, 06:54 AM
    Vectors
    The vector sum of two forces is perpendicular to their vector difference. In that case the forces are.. Options :- a) equal to each other b) equal to each other in magnitude c) not equal to each other in magnitude... Ans is b... explanation??
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jun 19, 2015, 07:25 AM
    Hint: what is special about the dot product of perpendicular vectors?
    Diksha Singh's Avatar
    Diksha Singh Posts: 6, Reputation: 1
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    #3

    Jun 19, 2015, 08:00 AM
    Quote Originally Posted by ebaines View Post
    Hint: what is special about the dot product of perpendicular vectors?
    Get it! Thank you.
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