InterviewSolution
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InterviewSolution
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A block of mass `1 Kg` is fastened to one each of a wire of cross-sectional area of `2mm^(2)` and is rotated in verticle circle of radius `20cm`. The speed of the block at the bottom of the circle is `3.5ms^(-1)`. The elongation of the wire when the block is at top of the circleA. `0.6125xx10^(-5)m`B. `0.6125xx10^(-4)m`C. `0.6125xx10^(-3)m`D. `0.6125xx10^(-2)m` |
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Answer» Correct Answer - A (i) Tension at the bottom of the circle, `T = (mv^(2))/(r) + mg, e = (Fl)/(AY)` (ii) Tension at the top of the circle, `T` = Tension at the bottom `-6mg` The increment in lengh `e = (Fl)/(AY)` |
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