A particle starts from rest with uniform acceleration a. its velocity after n seconds is v. the displacement of the particle in last two seconds is:
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calculate s1 = u(t-2) + 1/2a(t-2)^2 and s2 = ut+1/2at^2 (Given u =0)
subtract the two ie s2-s1 = 1/2at^2 - 1/2a(t-2)^2
= 1/2a(t^2 - t^2-4+2t) = a(t-2)
displacement = a(t-2)
subtract the two ie s2-s1 = 1/2at^2 - 1/2a(t-2)^2
= 1/2a(t^2 - t^2-4+2t) = a(t-2)
displacement = a(t-2)
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