How large a force is necessary to stretch a 2.0 mm radius steel wire (Y = 2.0 × 10^11 N/m2) by 2.0%?
a. 5.0 × 10^4 N
c. 2.5 × 10^3 N
b. 2.5 × 10^4 N
d. 1.3 × 10^4 N
A
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