Work Energy And Power Question 214

Question: A spring of spring constant 5×103N/m is stretched initially by 5 cm from the upstretched position. Then the work required to stretch it further by another 5 cm is

Options:

A) 18.75 J

B) 25.00 J

C) 6.25 J

D) 12.50 J

Show Answer

Answer:

Correct Answer: A

Solution:

[a] W1=12×5×103(0.05)2

W2=12×5×103(0.10)2

ΔW=12×5×103×0.15×0.05=18.75J.



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