A block of weight 10 N is fastened to one end of a wire of cross-sectional area 3 mm2 and is rotated in a vertical circle of radius 20 cm. The speed of the block at the bottom of the circle is 2 ms−1. If the Young modulus of the material of the wire is 2×1011 Nm−2, what is the elongation of the wire when the block is at the bottom of the circle?

A block of weight 10 N is fastened to one end of a wire of cross-secti

1.	A block of weight 10 N is fastened to one end of a wire of cross-sectional area 3 mm2 and is rotated in a vertical circle of radius 20 cm. The speed of the block at the bottom of the circle is 2 ms−1. If the Young modulus of the material of the wire is 2×1011 Nm−2, what is the elongation of the wire when the block is at the bottom of the circle?
Answer» A block of weight $10 N$ is fastened to one end of a wire of cross-sectional area $3 m m^{2}$ and is rotated in a vertical circle of radius $20 c m$ . The speed of the block at the bottom of the circle is $2 m s^{- 1}$ . If the Young modulus of the material of the wire is $2 \times 10^{11} N m^{- 2}$ , what is the elongation of the wire when the block is at the bottom of the circle?

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