mechanices

the resultant of two forces is p and q is R.if q is doubled and R is also doubled,if q is reversed.show that p:q:r=2:3:2

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asked by janu
  1. p+q = r
    p+(-q) = 2r
    so,
    2p = 3r
    see what you can do with that. Not quite sure what you means when you say q is doubled if it is reversed ...

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