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A spring of force constant 800N//m has a...

A spring of force constant `800N//m` has an extension of 5cm. The work done in extending it from 5cm to 15cm is

A

16 J

B

8 J

C

32 J

D

24 J

Text Solution

Verified by Experts

The correct Answer is:
B
`W=(1)/(2)k(x_(2)^(2)-x_(1)^(2))=(1)/(2)xx800xx(15^(2)-5^(2))xx10^(-4)=8J`
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Knowledge Check

  • A spring of force constant 800 N/m has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is:

    A
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    B
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    C
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    D
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