A block of 2 kg is suspended from a ceiling by a massless spring of spring constant k = 100 N/m. What is the elongation of the spring? If another 1 kg is added to the block, what would be the further elongation?
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Solution
Given, mass of the first block, m = 2 kg k = 100 N/m Let elongation in the spring be x. From the free-body diagram, kx = mg
Suppose, further elongation, when the 1 kg block is added, is . Then, ⇒ k= 3g − 2g = g