Properties of matterMedium
Question
A steel wire 1.5 m long and of radius 1 mm is attached with a load 3 kg at one end the other end of the wire is fixed it is whirled in a vertical circle with a frequency 2Hz. Find the elongation of the wire when the weight is at the lowest position - (Y = 2 × 1011 N/m2 and g = 10 m/s2)
Options
A.1.77 × 10-3 m
B.7.17 × 10-3 m
C.3.17 × 10-7 m
D.3.37 × 10-7 m
Solution
Tension in wire at lowest position
T = mg + mω2r
So elongation
T = mg + mω2r
So elongation
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