A. 4.05m
B. 4.08m
C. 5.05m
D. 6.08m
Correct Answer:
Option B = 4.08m
Explanation
From hooke’s law F=Ke
F1/e1 = F2/e2
therefore 4/0.02 = 15/e2
e1 = 0.02×15/4 = 0.075M
The new length of the string is 4 + 0.075
= 4.075
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