1. The problem statement, all variables and given/known data 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? 2. Relevant equations T=2 pi (m/k)1/2 3. The attempt at a solution 1 = 2 pi (m/0.1)1/2 1 = 4 pi2 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.