Question

A spring when compressed by 4 cm has 2J energy stored in it. The force required to extend it by 8cm will be

Answer 1

We first need to find the spring constant.
1/2 k (4)^2 = 2
k × 16 = 4
k = 1/4 N/cm
Force required,
F = kx
x = 8 cm
F = 1/4 × 8 = 2 N.
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Answer 2

Explanation:

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