9. A wire of length 1m and diameter 10-2 m is fixed at one end and twi – InterviewSolution

1.

9. A wire of length 1m and diameter 10-2 m is fixed at one end and twisted at the other end through an angle of 70˚ by applying a couple of value 0.01 Nm. Evaluate the rigidity modulus of the wire.

Answer»

Given:

l = 1m

diameter = $10^-^2$ m

angle = 70°

value of COUPLE = 0.01Nm

To FIND:

RIGIDITY Modulus

Solution:

Φ ≈ tanΦ = $\frac{r\theta}{l}$

≈ $\frac{6\cdot 10^-^3\cdot30^0}{1}$

≈ $(180\cdot 10^-^3)^{0}$

≈ 0.18°

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