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## Homework Statement

The pendulum of a clock is replaced by a spring-mass system with the spring having spring constant 0.1 N/m. What mass should be attached to the spring?

## Homework Equations

T=2 pi (m/k)

^{1/2}

## The Attempt at a Solution

1 = 2 pi (m/0.1)

^{1/2}

1 = 4 pi

^{2}m/0.1

solving this, m= 25 grams

The answer is supposed to be 10 grams. What is wrong in my solution?

Thanks for the help.