ANSWERS: 1

the balls was swinging 200mts above the floor.So when the string broke it was at a height of 2.6 mts above the floor.Ok It rose to a height of 6mts in total hence from the point of release it rose a height of 62.6 mts hence total height it rose was 3.4 mts now put the height velocity formula as final velocity was 0 V^2U^2=2gS so U=square root 2gs =2*3.4*9.8= approx 8.2 now about the tension in the string = centripetal force mV^2/r =0.1*66.64/0.6==66.64/6=11.1 N
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