A) k
B) 1.25 k
C) 1.56 k
D) 1.95 k
Correct Answer: C
Solution :
d=10 mm, \[{{n}_{1}}=8,\] \[{{D}_{ml}}=75\,mm\] \[{{n}_{2}}=10,\] \[{{D}_{m2}}=60\,mm\] Spring stiffness, \[k=\frac{G{{d}^{4}}}{8D_{m}^{3}n}\] \[\therefore \,\,k\propto \frac{1}{D_{m}^{3}n}\] \[\frac{{{k}_{2}}}{{{k}_{1}}}=\frac{D_{m1}^{3}{{n}_{1}}}{D_{m2}^{3}{{n}_{2}}}={{\left( \frac{75}{60} \right)}^{3}}\times \frac{8}{10}\] \[{{k}_{2}}=1.5625\,\,k\]You need to login to perform this action.
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