Question

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Answer 1

Answer:38.33 Kg

Step-by-step explanation:

If $mKg$ of mass is placed on spring with spring constant $k$,

$mg=kx$

where $g$ is universal gravitational constant

$x$ is the displacement in the spring.

In case 1:

$25g=k(0.15)\\k=\frac{25g}{0.15}$

In case 2:

$mg=k(0.23)$

Using  result from case 1,

$mg=\frac{25g}{0.15}\times 0.23$

$m=$$38.33Kg$