1.

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.

Answer» Correct Answer - 14
`s_1 = 5(-3) = 8m`
`s_2 = -7-(-3) = -4m`
`s_3 = -3-7 = -10m`
Required value = `(s_2+s_3) = (-14) = 14`.


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