Question

. A spring of force constant 20 N/m and natural length 60 cm initially lies on the xaxis with its ends A and B at x = 0 and x = 60 cm respectively. Holding A fixed, you first pull and move the end B till it comes to a hook fixed to a wall at x = 100 cm. Then you tie the end B of the spring to the hook to keep it fixed and then move the end A till it reaches x = -30 cm. Find the force exerted by the spring end B on the hook.

Answer 1

Answer:

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