# A particle moving with an initial velocity of 5m/s is subjected to a uniform acceleration of -2.5m/s2. Find the displacement in the next 4 sec.

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s=ut+1/2at2

5×4+1/2 (-2.5)16

20+1/2(-2.5) 16

20×1/2×(-40)=

20+(-20 )

cancel +20 and-20=0