Consider a metal bar of initial length L and cross-sectional area A. The Young's modulus of the material of the bar is Y. Find the "spring constant" k of such a bar for low values of tensile strain. 2. Ten identical steel wires have equal lengths Land equal "spring constants" k. The wires are connected end to end, so that the resultant wire has length 10L. What is the "spring constant" of the resulting wire?
a. 0.1k
b. k
c. 10k
d. 100k
3. Ten identical steel wires haveequal lengths Land equal "spring constants" k. The wires are slightly twisted together, so that the resultant wirehas length Land is 10 times as thick as each individual wire. What is the"spring constant" of the resulting wire?
a.0.1k
b. k
c. 10k
d. 100k
4. Consider a steel guitar string ofinitial length L=1.00 m and cross-sectional area A = 0.500 m^2 . The Young's modulus of the steel is Y = 2.0 * 10^11 Pa . How far (DeltaL) would such a string stretch under a tension of 1500N?