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A sphere of radius 0.1 m and mass 8 pi k...

A sphere of radius 0.1 m and mass `8 pi` kg is attached to the lower end of a steel wire of length 5 m and diameter `10^-3m`. The wire is suspended from 5.22 m high ceiling of a room. When the sphere is made to swing as a simple pendulam. It just grazes the floor at the lowest point. Given Young's modulus of steel is `1.994 times 10^11 N.m^-2`
What is the extension of the wire at the mean position when the sphere is oscillating?

A

0.01 m

B

0.02 m

C

0.03m

D

0.04m

Text Solution

Verified by Experts

The correct Answer is:
B
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