Hmm. We know that the mass of a spring is 0.25kg & the spring constant is 1 kN/m but we're being asked to factor in the extension and don't know what that means?
There's an equation which requires her to know the mass, the spring constant and the extension but we don't have the information for the extension and assume we should be able to work it out from the other two.
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They either have to give you the extension, or they're asking you to calculate it using Hooke's law: F=-kx.
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But we don't have force. We just have mass and constant.
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Is it hanging vertically?
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It has been dropped and is compressed.
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What force is acting on the mass to cause the compression?
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Wait, there's a drop involved? Then you'll need to think about work and energy, not just F=-kx.
End of conversation
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