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A body of mass 1 kg is attached to one and of a wire and roted inHorizontalcircle of diameter 40cm what constant speed of2 m/s whatof. is the area of cross -section of the wire if the stress developed in the wire is5 X 106N/m² ?​

Answer»

n:A BODY of mass 1 KG is attached to one END of a wire and roted in horizontal circle of diameter 40cm what constant speed of 2 m/s what of is the area of cross - section of the wire if the stress DEVELOPED in the wire is 5 X 106 N/m² ?Answer:m=1kg,d=40cm,v=2m/s,stress S=5*10^(6)N/m^2r=20cmWhen ROTATING the centripetal force is acting on the massF=mv^2/r=4/0.2=20NStress developed in the wire=force per unit areaS=F/AArea of cross section A=F/SA=20/5*10^(6)=4*(10^(-3))^2=4mm^2A=4mm^2



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