Question

A particle moving with u= 5m/s and uniform a= -2.5 m/s find the displacement in next 4 sec?

Answer 1

Apply the equation of motion

S=ut+ 1/2 at^2

S== 5*4+1/2*-2.5*16
......20+8*-2.5

20-20
0

Hence displacement is zero

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