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A particle can move only along x-axis. T...

A particle can move only along x-axis. Three pairs of initial and final positions of particle at two successive times are given
Pair Initial positions Final position
1 (-3)m (+5)m
2 (-3) m (-7)m
3 (+7) (-3),
Find the sum of magnitudes of displacement in the pairs
which give negative displacement in m.

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