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What is the correct answer?
4
A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is
A.
5 N-m
B.
7 N-m
C.
10 N-m
D.
15 N-m
Correct Answer :
D. 15 N-m
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