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A spring of stiffness 1000 N/m is streteched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is. | |
A. | 5 N-m [Wrong Answer] |
B. | 7 N-m [Wrong Answer] |
C. | 10 N-m [Wrong Answer] |
D. | 15 N-m [Correct Answer] |