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Sagot :
0.36 J of work is done in stretching the spring from 15 cm to 18 cm.
To find the correct answer, we need to know about the work done to strech a string.
What is the work required to strech a string?
- Mathematically, the work done to strech a string is given as 1/2 ×K×x².
- K is the spring constant.
What will be the spring constant, if 40N force is required to hold a 10 cm to 15 cm streched spring?
- The force experienced by a streched spring is given as Kx. x is the length of the spring streched from its natural length.
- Then K = Force / x.
- Here x = 15 - 10 = 5 cm = 0.05 m
- K = 40/0.05 = 800N/m.
What will be the work required to strech that spring from 15 cm to 18 cm?
- Work done = 1/2×k×x²
- Here x= 18-15=3cm or 0.03 m
- So, W= 1/2×800×0.03² = 0.36 J.
Thus, we can conclude that the work done is 0.36 J.
Learn more about the spring force here:
brainly.com/question/14970750
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