Two like parallel forces $P$ and $Q (P > Q)$ act on a rigid body. If the force P is displaced parallel to itself through a distance d, then the resultant of the forces $P$ and $Q$ would be shifted by a distance
1). $\frac{P}{{P + Q}}d$
2). $\frac{P}{{P - Q}}d$
3). $\frac{Q}{{P - Q}}d$
4). $\frac{Q}{{Q - P}}d$
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