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Ona statightroada policemanin ajeepchasesathiefwitha speedv.Whenthe thiefis adistancedfromthepolice- jeep, thethiefescapeswitha bikewitha constantaccelerationa.The policecancatchthe thiefifv^(2)ge2 ad - proveit . |
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Answer» Solution :F thevelocityof thebikeof thethiefincrease from0 tovin timet , V= ator ,`t= ( v) /(a)` thedistancetravelledby thethiefin timet , ` s =(1)/(2)at^(2)=(1)/(2)a ( (v)/( a))^(2)= ( 1)/(2)( v^(2))/(a)` the distancetravelledbythepolice- jeepin timethas TOBE atleast( s+d) . hence, v `* ((v)/(a)) ge s+d` or ,` (v^2)/(a )ge(1)/(2)( v^(2))/(a)+ DOR ,(1)/(2) (v^(2))/(a)ged ` `or ,v^(2)ge2ad ` |
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