Comprehension (Figure 5.126): A small block of mass m is fixed at the upper end of a massless vertical spring of constant K = L 4 m g and natural length 10 L . The lower end of the spring is free an

Question

Comprehension (Figure 5.126): A small block of mass $m$ is fixed at the upper end of a massless vertical spring of constant $K = \frac{4 m g}{L}$ and natural length $10 L$ . The lower end of the spring is free and at height $L$ above a fixed horizontal floor. The spring is unstressed and the system is released from rest. At the instant the speed of the block is maximum, the magnitude of force exerted by the spring on the block is:

TestHub · Accepted Answer

Speed is maximum at the equilibrium point where spring force balances weight: F = m g .

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