A body initially at rest is having a constant acceleration 4ms^-2 .The distance covered by it in 9th quarter second is
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The distance cover by the body in 9th quarter second is 7 m.
For uniform motion, the distance cover by a body in nth second is given by the formula
S=u+(2n-1)
here, u is the intial velocity, n is the time, a is the acceleration
9th quarter second means=9×0.25=2.25 sec
Plugging all the values in the equation above
S=0+(4/2)(2×2.25-1)=7 m
Therefore distance cover by the body in 9th quarter second is 7m.
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