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## Homework Statement

a steel spring that it extends by 10cm in equilibrium when you attach the upper end of the spring to a fixed support and hang a weight of 100g at the lower end.

And I found k and T, so how about if I change the weight to 1kg at the lower end and do the same thing?

## Homework Equations

F = -kx

## The Attempt at a Solution

I found they actually same.

when 100g

mg=kx

k=9.81

T=2pi*sqrt(m/k) = 2*pi*sqrt(0.1/9.81) = ...

when 1kg

mg=kx

k = 98.1

T=2pi*sqrt(m/k) = 2*pi*sqrt(1/98.1) = ...

same!?

I think I did wrong, who can help me?

THANK YOU!